Wondered if someone had any further suggestions. This condition results in a greater voltage on the ECT sensor. Anyhow I just recently bought a 06 LBZ and last night as I was driving I noticed the engine temp gauge wasn't getting up to its normal operating temp and this had me very concerned. In most cases you will get a P0128 – Coolant temperature below thermostat regulating temperature fault code. That said, I looked up "P0128", via Google. What to check for:. The P0128 code means that the engine coolant is not getting warm enough, fast enough. P0128 Thermostat Rationality - With the engine running, start up coolant temperature less than 65°C (149°F), ambient temperature between -8°C (17. What can I do to fix this problem. Code Analysis-P0128 I'm by no means a mechanic but I have read several times that there is an ideal mix of antifreeze and water. So I topped the coolant and the light went off. A code P0128 may mean that one or more of the following has happened: Low engine coolant level Leaking or stuck open thermostat Faulty cooling fan (running too much) Faulty coolant temperature (ECT) sensor Faulty intake air temperature (IAT) sensor Possible Solutions Past experience indicates that the most likely solution is to replace the. The day after getting it registered and inspected, the "service engine soon" light came on. Check the "Possible Causes" listed above. if the engine does not reach operating tempature quick enough, the power control module will set a code po128. The intent of the P0128 code is to indicate a faulty thermostat. now i'm getting the two codes p0171 and p0172. P0128 Auto Trouble Code on vehicles with electronically controlled automatic transmissions, the 3-4 shift solenoid is responsible for actuating the hydraulic circuits to activate clutches or bands that change gears inside the automatic transmission. If you like to gamble and have some decent skills under the hood, you could simply replace the sensor that is assigned to detect whatever code(s). Another consequence of P0128 engine overheating may be a blown head gasket. After driving couple of hundred miles it came again. My check engine light is on, P0128 I bought my mini yesterday, took a long drive today, on the way home the check engine light comes on. simple repair, just a simple thermostat replacement. The engine code P0128 is stored in memory when the ECU detects a possible fault in the thermostat. What can I do to fix this problem. TechShop Managing Editor Eric Garbe provides troubleshooting tips for diagnostic trouble code P0128 Coolant Temperature Too Low or Faulty Coolant Thermostat. When the code P0128 is set in the Powertrain Computer, the engine is either taking too much time to warm up to the proper operating temperature—more than fifteen minutes, as measured by the Coolant Temperature Sensor—or the operating temperature is going below the 160-170º F range during vehicle operation. I have just purchased a 2005 C230 Kompressor with a code P0128. Got it into the dealer and they ran codes which showed P0128. Learn what does P0128 Coolant Thermostat Malfunction means, location and how to repair? The thermostat is a component that blocks the flow of coolant to the radiator until the engine has warmed up. and they said it was. FIXD explains symptoms, causes, and severity of P0128. I decided to just replace thermostat with a Fail-Safe one. Reading the code showed P0128 "coolant Temp Below Thermostat Regulating Temp". Also, coolant level. All vehicles from 1996-newer sold in North America support this generic powertrain code. check engine light came on, code reader says it's a p0128 coolant temp too lowanyways, the car seems to warm up fine , and I get hot air from the heater, however the temp gauge when driving is about 1/8 inch below the normal mark whne the car is fully warmed upwhat do you guys think?. I always have the impression that usually diesel cars are not sensitive to throw out faulty codes until something is really going wrong. I checked the coolant level and it was below minimum level - so I added some to bring the level between max and min levels. check engine light came on, code reader says it's a p0128 coolant temp too lowanyways, the car seems to warm up fine , and I get hot air from the heater, however the temp gauge when driving is about 1/8 inch below the normal mark whne the car is fully warmed upwhat do you guys think?. If it comes back,flush and replace thermostat. After disconnecting and reconnecting the negative battery clamp, if the check engine light is still on when you start your Pontiac, this means the codes were not cleared out of the computer. engine is not running hot enough from a bad thermostat. Fix Honda Civic P0128 code. I installed a lower temperature (I forget if it was. The two codes from the check engine light are: P0126 & P0128. OBDII/EOBD diagnostics trouble codes definition. check engine light came on, code reader says it's a p0128 coolant temp too lowanyways, the car seems to warm up fine , and I get hot air from the heater, however the temp gauge when driving is about 1/8 inch below the normal mark whne the car is fully warmed upwhat do you guys think?. Vehicle Immobilozer Control Module. P0128 was the code, I was wondering if I just hit the reset button on the screen would that eliminate the check engine light coming on ? I did not check the hoses with an infared for temperature coming in and out of the thermastat. Bought a scanner and decided it might be leftover code from the repaired issue so I cleared the code. Mechanic got the other codes off with the replacing of the coils. Hi everyone, I just purchased a used 2007 Altima that is throwing engine codes P1777 and P0128. Here is what I found according to my research: P0126 is either replace coolant temperature sensor or replace the thermostat. The day after getting it registered and inspected, the "service engine soon" light came on. That said, I looked up "P0128", via Google. Also, coolant level. Check the "Possible Causes" listed above. Last night I was driving and my check engine light came on. Cleared it, running fine for 2 weeks and came back again. In other words the engine is running too cold – or at least the PCM thinks it is. My check engine light lit up today and pulled the codes. What this means is the engine is unable to reach the proper operating temperature after starting the motor. In other words, there is a problem with the engine operating temperature not being reached within a certain amount of time. Hi everyone, I searched for this question as I was sure it had been asked before, but couldn't find anything. It's a generic powertrain code, which means that regardless of who manufactured the vehicle, it'll have the same meaning (1996+). Mar 13, 2015. Its been driven about 100 miles w/o any performance or cooling issues. 100% Guaranteed! - Jetclean 1 Review. Chrysler Town+and+Country P0128 OBD-II Diagnostic Powertrain (P) Trouble Code Information Page. Other than that it is just normal even with A/C on. I have a 2007 Buick v-6 lucerne cxl the engine light came on two days ago. This has happened thrice. P0128- What it Really Means, Causes, Symptoms, Severity, and Cost to Repair. simple repair, just a simple thermostat replacement. For P1338, if replacing the sensor does nothing your engine timing could be off. When is the code detected? If the Powertrain Control Module (PCM) detects the calibrated amount of air flow and engine run time have been met, and the Engine Coolant Temperature (ECT) has not met the minimum thermostat regulating temperature, the code P0128 will set. So I looked up the code using my Torque App on my tablet to see what it was. 2006 Honda Civic Code P0128[Eng 1. P0128 Engine Fault Code Check Solution For P0128 OBD Code : P0128 engine code seems a kind of powertrain problem, we try to show one by one the meaning and the solution. 8] was created by Wurster Installed new thermostat. There is one O2 (oxygen) sensor in front of the catalytic converter (called upstream), and one behind it (downstream). I checked the OBDII code twice and it gave me same fault code: P0128 and P0604. They’ve eliminated the possibility of bad coils by switching them around and the misfire codes did not move. It should be covered under your 8/80 extended federal emissions warranty: tsb_wk2_1811016. It's code P0128 (Coolant Temp Below Thermostat Regulating Temperature) I figure replacing the thermostat would likely solve this, yes? Anything else it could likely be? How much should I be looking to pay for a new thermostat and any other things I'd need for it on a 2001 330xi?. Dodge caravan coolant flush. Given the drive cycle to see if the code resets, look for the engine temperature to reach the estimated engine coolant temperature of about 172 degrees in about 10 minutes of driving. A P0420 code is a trouble code on OBD-II equipped vehicles. drivers side, for possible adjusting. Any thoughts? Comments? Thanks in advance for the help. What can I do to fix this problem. It's code P0128 (Coolant Temp Below Thermostat Regulating Temperature) I figure replacing the thermostat would likely solve this, yes? Anything else it could likely be? How much should I be looking to pay for a new thermostat and any other things I'd need for it on a 2001 330xi?. I was told it could either be a thermostat or a temperature sending unit. Checked YouTube and the internet and everything said replace the thermostat as it probable stuck open. I used some BlueDevil Headgasket Sealant, it really works. phonedawgz Member. Reason for Chrysler Town+and+Country P0128 and find the solution for the code Chrysler Town+and+Country P0128 , we'll give to how to fix Chrysler Town+and+Country P0128 trouble code problem. P0128 Thermostat Rationality - With the engine running, start up coolant temperature less than 65°C (149°F), ambient temperature between -8°C (17. Un código P0128 puede ser causado por uno o más de los siguientes problemas: El termostato puede estar pegado o presenta fugas. c/o GateHouse Auto; 108 Myrtle Street, 5th Floor; Quincy, MA 02171; Connect on Facebook; Follow on Twitter; Join on Google Plus; Contact Us; Dealer Contact. 7 and carbon deposit on the vent pipe. I contacted on-star and was told it was a cooling system trouble code P0128. El tiempo de calentamiento no es suficiente. DTC P0128 Circuit Description An engine coolant temperature (ECT) sensor monitors the temperature of the coolant. Find the repair process of P0128 Acura OBD 2 engine fault code. If it comes back,flush and replace thermostat. The fans would run and the a/c would be turned off due to the fact that the ECM does not know the true ECT and must assume an overheated condition in order to preserve the engine. The P0128 indicates that the PCM has received a coolant temperature reading from the ECT sensor that is lower than normal, after a significant period of engine operation. My girlfriend has a 2006 sentra SE with 40k+ miles. All is good now. Check Engine OBD II or OBD-2 trouble codes, what OBD II codes mean, Ford Escape 2008-2012, Ford Explorer 2006-2010, Toyota FJ Cruiser 2007-2013, More The code P0128 essentially indicates that the. * Inspect the ECT sensor terminals and the ECT harness connector for corrosion. Based on what I've found, this code indicates thermostat issue as the engine has not warmed up with-in established time limits. Here is what I found according to my research: P0126 is either replace coolant temperature sensor or replace the thermostat. P0128 - Coolant Temperature Below Thermostat Regulating Temperature P0128 is a OBDII code that indicates that the ideal engine coolant temperature is not being reached either fast enough or at all. 3 for the week and on day 2 he called me to tell me that the check engine light came on so he used his father's OBDII tool and found a "P0128" code. P0128 DODGE Description Indicates that the thermostat monitor has not achieved the required engine operating temperature within a specified amount of time after starting the engine. No coolant drop or other obvious symptoms. P0128 0x348A Program map thermostat: Sticking in open position Depending on what MINI FC code is associated with the 2 P codes above, these are what they read via the Bentley Manual. Check your coolant level. The P0128 code means that the engine coolant is not getting warm enough, fast enough. Said they only checked out a few of the codes. From searching on the web it seems most likely to be a stuck open thermostat. No coolant drop or other obvious symptoms. It was an open t-stat. DTC P0128 has been discussed in the following consumer complaints. What this means is the engine is unable to reach the proper operating temperature after starting the motor. Hood Flutter - check under hood bumpers, esp. It seems to have a lower temp thermostat in it (temp runs up to around 200 at idle, but drops to 160ish when you drive it), and it threw a P0128 (low coolant temp) code the other day. The shaft looks bend. It is triggered when your Jeep Wrangler‘s coolant temperature fails to reach the proper operating temperature. If the readings you get in the Coolant Temperature will not go beyond 160° - 170° F in the span of 15 minutes, then try to put your foot on the brake, shift to Drive and then press the throttle for around two to three minutes and see if the readings increase. I'm not exactly convinced it's actually stuck open. The P0128 code keeps coming up. Re: P0128 code 07' G6What needs replacing? Yes, it's the thermostat, just replace it. 7 2WD, P0128 Code Just FYI, the Colorado pictured above is not the one this issue occured. DTC Descriptor This diagnostic procedure supports the following DTC: DTC P0128 Engine Coolant Temperature (ECT) Below Thermostat Regulating Temperature. The fans would run and the a/c would be turned off due to the fact that the ECM does not know the true ECT and must assume an overheated condition in order to preserve the engine. I checked that, and the level is perfect. Similar codes: P0125 In determining the engine did not reach a "normal" temperature, it takes into account the length of time the vehicle has been running, the intake air temperature (IAT) sensor reading, the engine coolant temperature (ECT) sensor reading, and the speed of. These codes are; P0128 - Coolant Thermostat (Coolant < reg. I have a P0128 DTC on my 2007 Silverado classic with 4. Garage did not specify which codes they checked. Mechanic got the other codes off with the replacing of the coils. A P0128 is a code is an indication of a faulty thermostat or ECT (engine coolant temp sensor). DTC P0128 Circuit Description An engine coolant temperature (ECT) sensor monitors the temperature of the coolant. Anyone hear have any experience with Code P0128 and what was the repair made to reslove this issue?. OBD2 Code P0128 GM definition: This means that the engine's PCM detected that the engine has not reached the required temperature level within a specified amount of time after starting the engine. also when i am in process of parking or turning my steering wheel at low speeds it turns off seems like its missing some torque or power. Autozone will usually do it for free if you ask them too. P0128 Mercedes-Benz Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) check for the real temperature using a laser temperature gun pointed at the thermostat housing when the car is warm (driven at least 10 miles) if the thermostat housing is less than 88 degrees Celsius then the thermostat has failed open (as its supposed to do). My girlfriend has a 2006 sentra SE with 40k+ miles. 3 V6 engine. P0128 Acura Auto Trouble Code description with all kind of problems on car models. The on-board diagnostics, or OBD, code P0442 can often be fixed by tightening the gas cap or replacing the gas cap. CEL Code P0128 Well, I just fixed my secondary air system CEL (P0140), and the damn CEL comes back on today. Check Engine Light Code: P0128 - New Thermostat Kit If this is your first visit, be sure to check out the FAQ by clicking the link above. Menu Post subject: 2006 Ford Focus ZX3 P0128 That code indicates low coolant, bad thermostat and/or sensor. Engine light has not come back on and I've driven it a lot, enough to bring it up to temp, and the part came in. P0128 is a relatively common OBDII trouble code. If you can help us with this, we'd certainly appreciate it. took it to mechanic. I always have the impression that usually diesel cars are not sensitive to throw out faulty codes until something is really going wrong. When is the code detected? If the Powertrain Control Module (PCM) detects the calibrated amount of air flow and engine run time have been met, and the Engine Coolant Temperature (ECT) has not met the minimum thermostat regulating temperature, the code P0128 will set. so does this mean that the thermostat is failing? ive been questing it lately anyway due to the fact that on the first start up of the day the gauge goes from cold to normal operating temp in under 3 minutes/ around an 8th of a mile i think. P0128 Meaning :. Engine code P0128 Anyone know why im getting engine coolant below thermostat regulating temp? This only happens when I'm babying the truck if I play somewhat with the throttle the code dosen't show. replaced thermostate and 3 pin temp. The on-board diagnostics, or OBD, code P0442 can often be fixed by tightening the gas cap or replacing the gas cap. P0128 DODGE Description Indicates that the thermostat monitor has not achieved the required engine operating temperature within a specified amount of time after starting the engine. Openbay is an online source that connects you with multiple auto service professionals nearby who will compete for your auto repair and maintenance business. After placing the new thermostat in place and filling the reservoir with fresh antifreeze (50/50. Code Analysis-P0128 I'm by no means a mechanic but I have read several times that there is an ideal mix of antifreeze and water. Read code w/scanner - "P0128 - Coolant Temp below thermostat regulating temperature". Disconnect the battery again and wait for 5 minutes before reconnecting the clamp. P0128 sets when it takes longer than normal for the engine to reach operating temperature. DTC P0128 is a Type B DTC. i was just driving about 10 minutes ago and my engine light came on, and the code was P0128-THERMOSTAT RATIONALITY, my mods are intake, 3 in. P0128 code could be triggered by a faulty Engine Coolant Sensor. i had a check engine light come on i had the auto part store check it out they gave a code of p0128, i know it has to do with the temperature sensor etc but when i am driving and coming to a stop my dome lights seem to dim and also my dash board lights. I pulled the code, P0128. The check engine light is on. Dodge Caravan P0128 Engine Trouble Code When the check engine light comes Dodge Caravan P0128 code on the first you should check is the gas cap. Cleared the code. I'd just add that the basic meaning for a P0128 code is: Coolant Thermostat Problem. If the tstat is stuck open, it's not going to hurt your motor, HOWEVER, your fuel injection system is designed to run based on the ECT input, so it could affect mpg and engine performance if the PCM isn't getting an ideal reading from the ECT sensor. Below you will find the most complete list of Saturn trouble codes available. A P0420 code is a trouble code on OBD-II equipped vehicles. My coolant is up to level and I don't think my thermostat is bad and fans work fine. simple repair, just a simple thermostat replacement. It's a mini cooper clubman. well I changed the thermostat and put in some antifreeze in it. I have A 2005 Malibu "new body" style 2. Claudio #. I had P0128 and P0128 (pd) code on 2001 camry with only 55k miles, check temperature gauge shows low up to long time and when i drive in traffic was showing normal, decided to change thermostat with OEM, Got from dealer for $28 + $6 for seal. Any one have any clue. Checked YouTube and the internet and everything said replace the thermostat as it probable stuck open. This article shows you how to use an OBD II scanner to read the check engine / ECU fault code. check engine light came on, code reader says it's a p0128 coolant temp too lowanyways, the car seems to warm up fine , and I get hot air from the heater, however the temp gauge when driving is about 1/8 inch below the normal mark whne the car is fully warmed upwhat do you guys think?. A code P0128 may mean that one or more of the following has happened: Low engine coolant level Leaking or stuck open thermostat Faulty cooling fan (running too much) Faulty coolant temperature (ECT) sensor Faulty intake air temperature (IAT) sensor _____. Diagnostic Trouble Code (DTC) Information ECM-201A THERMOSTAT DIAGNOSTIC TROUBLE CODE (DTC) INFORMATION Condition During the engine warm up phase the way the engine temperature should increase is calculated. P0128 - Coolant Temperature Below Thermostat Regulating Temperature P0128 is a OBDII code that indicates that the ideal engine coolant temperature is not being reached either fast enough or at all. After driving couple of hundred miles it came again. SEE no cat, and motor mounts, im just stumped what this code means, any help would be great!. Ford Focus Fault Code P0128 Your OBD-II Trouble Codes Repair Site. 5º F and 113º F. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc. Below you will find the most complete list of Saturn trouble codes available. I've been monitoring my ECT via my AP like a hawk since it threw this code twice. I have p0128 coming up on my 3. These codes are; P0128 - Coolant Thermostat (Coolant < reg. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc. Cleaned wiring contacts. i have been having an issue with a recurring P0128 code on a 2005 scion xb. It goes up only when driving up hill. I have just purchased a 2005 C230 Kompressor with a code P0128. c/o GateHouse Auto; 108 Myrtle Street, 5th Floor; Quincy, MA 02171; Connect on Facebook; Follow on Twitter; Join on Google Plus; Contact Us; Dealer Contact. Similar codes: P0125 In determining the engine did not reach a “normal” temperature, it takes into account the length of time the vehicle has been running, the intake air temperature (IAT) sensor reading, the engine coolant temperature (ECT) sensor reading, and the speed of. this morning I plugged in my bully dog power pug and code P0128 came up along. However, I got a new code this time: P 0128 I didn't see any posts here for that one, so I'm starting a new thread. P0128 Code - too early Welcome to 9th Gen Civic Forum : 2012 Honda Civic Forums - 9th Generation – General discussion forum for 9th Gen Civic Welcome to 9th Gen Civic Forum : 2012 Honda Civic Forums - 9th Generation - a website dedicated to all things 9th Gen Civic. Code Analysis-P0128 I'm by no means a mechanic but I have read several times that there is an ideal mix of antifreeze and water. The open t-stat will cause the engine to take longer to heat up and trigger the P0128 code. The code is P0128, Coolant Thermostat, Coolant Temperature Below Thermostat Regulating Temperature. I reset it and maybe a few days pass and it does it again. We were seeing a P0128 code which indicates; Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature). This time I checked with Peake tool and got code 19 25 A8. Dodge Caravan P0128 Engine Trouble Code When the check engine light comes Dodge Caravan P0128 code on the first you should check is the gas cap. Based on what I've found, this code indicates thermostat issue as the engine has not warmed up with-in established time limits. Re: P0128 code 07' G6What needs replacing? Yes, it's the thermostat, just replace it. I went to an auto store today and they did the computer thing and they said it was Code P0128 and they said it should go off by itself after a few driving cycles. The intent of the P0128 code is to indicate a faulty thermostat. Within two days/twenty miles' worth of driving of picking up the car, the light came back on again. When is the code detected? If the Powertrain Control Module (PCM) detects the calibrated amount of air flow and engine run time have been met, and the Engine Coolant Temperature (ECT) has not met the minimum thermostat regulating temperature, the code P0128 will set. Now understand the troubleshooting chart is very basic, if the coolant isn't low (step one check coolant level) then step 2 is change the thermostat. Normally, a P0128 code can be caused by a defective thermostat or a bad engine coolant temperature sensor. The check engine light is on. I lost maybe a quart including draining the coolant reservoir that I replaced. if the engine does not reach operating tempature quick enough, the power control module will set a code po128. Yeah the 86 with a 02 3800sc. Eventually the CEL came on, I checked it and discovered I had 2 codes, both p0128(it's really annoying that an open t-stat throws a CEL). Conditions for this code to set: If the engine computer detects the calibrated amount of air flow (determined using the IAT sensor) and engine run time have been met, and the coolant temperature has not met the minimum thermostat regulating temperature, the P0128 code will be set. Check the "Possible Causes" listed above. First you should be running a 195 deg thermo. Help w/ thermostat and P0128 Code The check engine on my 01 530 just came on with OBD codeP0128 - "Coolant Thermostat (Coolant Temp Below Thermostat Regulating Temperature)". Running the diablo tune woke the durango up. Check Engine OBD II or OBD-2 trouble codes, what OBD II codes mean, Ford Escape 2008-2012, Ford Explorer 2006-2010, Toyota FJ Cruiser 2007-2013, More The code P0128 essentially indicates that the. P0128 Ford Focus P0128 Ford Focus Code P0128 Ford Focus, Check engine light on, A P0128 Ford Focus trouble code is fairly common with the 2. I had the same issue with this code back in the early spring ( 2005 2. My check engine light is on, P0128 I bought my mini yesterday, took a long drive today, on the way home the check engine light comes on. Is there a regulator or something that could be cau. The heater and temp gauge works OK? I would try the PCM flash that is addressed in TSB # 18-110-16. I have 2001 Toyota Camry LE 4 cylinders at 186k. The intent of the P0128 GM code is to indicate a faulty thermostat. The code has to do with the thermostat not performing as specified, or the temperature sensor is not working. See here for a step-by-step guide on how to diagnose and fix Chevrolet check engine light code P0128. Q: The Check Engine Light came on, and I had a diagnostic, which showed code P0128, which has to do with thermostat. CEL p0128 code 'coolant temp below thermostat regulating temp' This would show up on cold days So I thought my IAT may be bad, so for $20 I changed that, but I am still getting the CEL and , in addition, code p0113 'IAT sensor 1 circuit high input'. After disconnecting and reconnecting the negative battery clamp, if the check engine light is still on when you start your Pontiac, this means the codes were not cleared out of the computer. I deal with this code at work all the time. My girlfriend has a 2006 sentra SE with 40k+ miles. i went to an autozone and they printed out the codes. My coolant is up to level and I don't think my thermostat is bad and fans work fine. Wondered if someone had any further suggestions. engine light keeps coming back-code p0128 i have a 2003 kia spectra 75,000 miles, take very good care of the car. It goes up only when driving up hill. and they said it was. The check engine light is on. There is one O2 (oxygen) sensor in front of the catalytic converter (called upstream), and one behind it (downstream). i am getting the above codes in my 2001 XC70 (with about 120,000 miles on it). Checked resistance through temp sensor and it varied with temp leading me to believe it is OK. When a trouble code P0128 exists by itself, usually a shop technician will suspect a fault engine coolant temperature sensor or stuck open thermostat. P0128 0x348A Program map thermostat: Sticking in open position Depending on what MINI FC code is associated with the 2 P codes above, these are what they read via the Bentley Manual. What can I do to fix this problem. This code is a pretty common one and this site is here to help the average do-it-yourself (DIY) car owner (like you) troubleshoot, diagnose, and fix their vehicle themselves when presented with a. 8 that has had some work done to it. The extra time will be sure to clear out the engine codes. sensor code p0128 returns after couple days driving. Running the diablo tune woke the durango up. Check Engine Light Code: P0128 - New Thermostat Kit If this is your first visit, be sure to check out the FAQ by clicking the link above. However, the temperature gaughe is working normal stay in the middle. DTC P0128 Circuit Description An engine coolant temperature (ECT) sensor monitors the temperature of the coolant. I was ready to punch the dealer after how hard it was to replace those 2 check valve/solenoids. I went to an auto store today and they did the computer thing and they said it was Code P0128 and they said it should go off by itself after a few driving cycles. A code P0128 may mean that one or more of the following has happened: Low engine coolant level Leaking or stuck open thermostat Faulty cooling fan (running too much) Faulty coolant temperature (ECT) sensor Faulty intake air temperature (IAT) sensor Possible Solutions Past experience indicates that the most likely solution is to replace the. Here is what I found according to my research: P0126 is either replace coolant temperature sensor or replace the thermostat. Also, coolant level. SEE no cat, and motor mounts, im just stumped what this code means, any help would be great!. replace thermostat. If the Powertrain Control Module (PCM) detects the calibrated amount of air flow and engine run time have been met, and the Engine Coolant Temperature (ECT) has not met the minimum thermostat regulating temperature, the code P0128 Mercedes-Benz will set. The P0128 indicates that the PCM has received a coolant temperature reading from the ECT sensor that is lower than normal, after a significant period of engine operation. When is the code detected? If the Powertrain Control Module (PCM) detects the calibrated amount of air flow and engine run time have been met, and the Engine Coolant Temperature (ECT) has not met the minimum thermostat regulating temperature, the code P0128 will set. When I looked at where on the engine where the sensor and thermostat was located (adjacent to one another) I decided my time was worth more than a $30 guess which one might be bad. CEL Code P0128 Well, I just fixed my secondary air system CEL (P0140), and the damn CEL comes back on today. anyone know what it could be?. Ford Focus Forum relating to general maintenance, electrical issues, engine trouble, and recalls. The intent of the P0128 code is to indicate a faulty thermostat. By posting the year, make, model and engine near the beginning of your help request, followed by the symptoms (no start, high idle, misfire etc. Bought a scanner and decided it might be leftover code from the repaired issue so I cleared the code. The P0128 can also be indicative of a failed IAT sensor as well. Check your coolant level. The computer looks at time running, intake air temp, coolant temp, and vehicle speed. This is just a pending code, so should I wait to see if it comes out as an actual code?-----86 SE Convertible 3800sc 4t65e HD. It goes up. I keep getting P0128 code, which usually is associated with the thermostat sticking. tok it back to mechanic, he changed the t stat and senso. In other words, there is a problem with the engine operating temperature not being reached within a certain. I'm pretty sure I need to replace the thermostat and I'm willing to try it myself. sensor code p0128 returns after couple days driving. This code will trigger the check engine light as follows: 1996-newer (OBD-II) vehicles use oxygen sensors and a catalytic converter to reduce emissions. Pull over, retighten it, and take a look at the cap to see if it has any cracks in it. If the the coolant level is OK, replace the thermostat. Should I change the. Re: First codeP0128 I was looking over the forums and found info on the thermostats as it is a normal issue to have them go bad on the housing, and from what I have read it is better to replace the housing, lower and upper, and thermostat, and the 2 sensors and all of the gaskets. Menu Post subject: 2006 Ford Focus ZX3 P0128 That code indicates low coolant, bad thermostat and/or sensor. FIXD explains symptoms, causes, and severity of P0128. A week later same engine light comes back on and code is P0128 (which is the thermostat code)?????. I'm not exactly convinced it's actually stuck open. P0128 sets when it takes longer than normal for the engine to reach operating temperature. My battery gauge is fluctuating, along with the temp and oil gauge. P0128: Yes, its primary function is to detect a bad thermostat. Other than that it is just normal even with A/C on. i just replace the Thermostat and cleared the codes but the p0128 keep coming back. Check eng light stayed off for about a month and has now reappeared. i had a check engine light come on i had the auto part store check it out they gave a code of p0128, i know it has to do with the temperature sensor etc but when i am driving and coming to a stop my dome lights seem to dim and also my dash board lights. If the regulating temperature of the coolant falls below 194°F, it will be detected by the powertrain control module. If you like to gamble and have some decent skills under the hood, you could simply replace the sensor that is assigned to detect whatever code(s). The 13-044 bulletin applies to the vehicles listed below. The manufacture designs the engine to run at a specific operating temperature for the most efficient operation. After disconnecting and reconnecting the negative battery clamp, if the check engine light is still on when you start your Pontiac, this means the codes were not cleared out of the computer. Generally caused by a thermostat that is partially stuck open and/or low engine coolant. If the the coolant level is OK, replace the thermostat. 2nd Gen Dakota Tech - Check engine light/p0128 code - I have 4x4 slt v8 4. Fix Honda Civic P0128 code. OBD2 Code P0128 Definition: This means that the engine’s PCM detected that the engine has not reached the required temperature level within a specified amount of time after starting the engine. 6r and with my scan tool, I watched and it takes a long time to get up to the operating temp. A code P0128 may mean that one or more of the following has happened: Low engine coolant level Leaking or stuck open thermostat Faulty cooling fan (running too much) Faulty coolant temperature (ECT) sensor Faulty intake air temperature (IAT) sensor Possible Solutions Past experience indicates that the most likely solution is to replace the. When I looked at where on the engine where the sensor and thermostat was located (adjacent to one another) I decided my time was worth more than a $30 guess which one might be bad. P0128 code could be triggered by a faulty Engine Coolant Sensor. HIYA AGAIN!! my car just threw up a check engine light and i read the codes and it was p0128. If there is a problem with the coolant temperature sensor, there are several trouble codes that can set for that as well. Hope more expensive really means better. That P0128 code is indicating your coolant is below regulating temperature. An engine coolant temperature (ECT) sensor monitors the temperature of the coolant.