Jeep p0128 - Jan 2, 2024 ... Error code P0128 indicates that your engine coolant temperature is below the thermostat regulating temperature. This means that your Engine ...

 
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If you’re in the market for a used Jeep, there are a few things you should keep in mind before making your purchase. Jeeps are known for their ruggedness and off-road capabilities,...P0128-THERMOSTAT RATIONALITY. For a complete wiring diagram,refer to the Wiring Information . When Monitored and Set Conditions. When Monitored: This diagnostic runs when the following conditions are met: - With the engine running. - Start up coolant temperature less than 65°C (149°F).Dec 16, 2022 · It is possible that some repairs will be required to fix or diagnose the underlying issue of Jeep P0128. A repair’s cost will be determined by the cost of the necessary parts and labor. If you want to make your own diagnosis and repair, follow these steps. The most common cause of P0128 is an open coolant thermostat in an engine. The P0128 code in Jeep Wrangler indicates that the engine coolant temperature is below the thermostat regulating temperature. This subheading will explain what the code means and why it occurs. The P0128 code typically triggers when the coolant temperature doesn’t reach the expected operating temperature within a certain time frame.548 posts · Joined 2014. #1 · Feb 17, 2020. Hi all. I got DTC code P0128 this morning - probably stuck thermostat. 2015 JKU with almost 80K... so probably it's time. Jeep is covered with lifetime powertrain warranty.Don't procrastinate on fixing misfires as they can quickly damage catalytics. as for your p0128, it was likely a history code (unless your check engine was on solid. p0128 will only reset after quite a few cycles (believe 40 from history). No worries as if it did set once, your thermostat was likely losing some performance.** Click "Show More" to Learn more about this video **=====Check out our NEW Website for 2023!!https://www.milehighcampers...After 500 Miles. You should only travel with the DTC code p0128 for 500 miles. During the distance, the car will not have much damage and risks. However, some people would travel more than 500 miles, which may cause car problems. It is not safe to go more than 1000 miles.Dec 21, 2016 · 34 posts · Joined 2012. #23 · Jan 13, 2017. Heads up that my 2012 JKU threw a P0128 and it was just because my coolant level had dropped below the min line. The colder weather was enough to trigger it. Once I added some coolant the code cleared and the CEL went away after about 3 drive cycles (about 3 days later). A bad flight attendant can ruin a stellar flight. An exceptional one can turn a routine flight into a blockbuster. We've seen airlines comes out with some pretty impressive seats i...Nov 5, 2018 · The most common symptom of a P0128 trouble code in a Jeep Liberty is an illuminated malfunction indicator lamp (MIL). Other symptoms may include poor engine performance and a decrease in fuel economy. Lack of heat– The most prominent symptom of the P0128 trouble code in the Jeep Liberty is the lack of heat. When the thermostat doesn’t bring ... What Does p0128 Jeep Grand Cherokee mean? The basic meaning of p0128 is the issue with the coolant thermostat temperature. When this code is triggered, the coolant thermostat temperature is below the regulating temperature. The primary cause for this DTC can be an open thermostat, damaged wearing, or a faulty …Sent from my SCH-S968C using Tapatalk. Like. trat73. 28 posts · Joined 2016. #3 · Jul 10, 2019. Having the same issue on same model TJ. 2006 2.4L. Replaced thermostat with Stant 195, replaced the Coolant Temperature Sensor (also Stant), and flushed and Burped the coolant. Still getting the P0128 code.=====Claim your FREE engine code eraser 👉 https://free.nonda.co 👈=====Engine Code P0128 Saving Repair Part...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. Past experience indicates that the most likely solution is to replace the thermostat.Mongo53. 5008 posts · Joined 2018. #6 · May 28, 2018 (Edited) The P0128 codes means the engine isn't warming up fast enough. Its for emissions, because a cold engine makes more pollution than a fully warmed up engine. Sure, logically an engine not warming up fast enough could be a thermostat.The Jeep JK code P0128 is a Diagnostic Trouble Code (DTC) that indicates a problem with the Engine Coolant Temperature (ECT) sensor or thermostat. This code suggests that the engine is not reaching the proper operating temperature within a specified time frame. 2. Possible causes of the P0128 code in a Jeep JK.Check Engine Light P0128 error code - 2013 Jeep Grand Cherokee (WK2) - thermostat replacementStep by step how to. My Jeep Grand Cherokee's check engine light...Fixing P0128 in the Jeep Compass is usually a pretty easy thing to do since, 90% of the time, a stuck thermostat will cause the problem. Here are the most common causes of P0128: Thermostat Stuck Open – Far and away, the most typical cause for the P0128 code is a thermostat that is stuck open. When a thermostat is stuck open, it allows ...Dec 15, 2011 · P0128 Thermostat Rationality. P0128 JEEP. Description. Indicates that the thermostat monitor has not achieved the required engine operating temperature within a specified amount of time after starting the engine. Symptoms- CEL. Possible causes. - Insufficient warm up time. - Low engine coolant level. - Leaking or stuck open thermostat. Feb 23, 2019 · ** Click "Show More" to Learn more about this video **=====Check out our NEW Website for 2023!!https://www.milehighcampers... – Repair or replace the coolant temperature sensor: If the coolant temperature sensor is faulty, consider repairing or replacing it to ensure accurate temperature …Pulled the code and yup, P0128. Heat is working great so I cleared the code since the light just irritates me and have been looking for the best place for the mopar part . Then today, low 40s and a strong headwind again and it came back on. ... It was a used 2014 Jeep Wrangler but I love her. She is a bright gold with …About two weeks ago while driving my jeep threw three codes. P0128 (coolant temp low), P0306 (misfire on cylinder 6) and random misfire. No real drivability problems other than a slight bog when the jeep shifted into third gear. I brought it to the dealer and the driver side cylinder head had to be replaced. Under warranty, thank God.Sirius satellite radio is available in many new cars, including Jaguar, Mazda, Ford, Jeep, Chrysler, Dodge, Mercedes-Benz, BMW, Volvo, Volkswagen and Audi vehicles. If your new car...The most common symptom of a P0128 trouble code in a Jeep Wrangler is an illuminated malfunction indicator lamp (MIL). Other symptoms may include poor engine performance and a decrease in fuel economy. 1. Lack of heat– The most prominent symptom of the P0128 trouble code in the Jeep … See moreJeep Platform Discussion. WK- Grand Cherokee (2005-2010) WK- Troubleshooting/Problems P0128- 2011 GC Overland 5.7 ... So I have the infamous P0128 code. The water pump was just replaced. I’m not over heating at all. I am however under heating by the gauges. Never gets above 170. And fluctuates by 4 …Ratchet said: P0128 sets when it takes longer than normal for the engine to reach operating temperature. Generally caused by a thermostat that is partially stuck open and/or low engine coolant. If there is a problem with the coolant temperature sensor, there are several trouble codes that can set for that as well.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. Past experience indicates that the most likely solution is to replace the thermostat.Oct 27, 2020 · =====Claim your FREE engine code eraser 👉 https://free.nonda.co 👈=====Engine Code P0128 Saving Repair Part... P0128 code (thermostat) after changing oil cooler housing. Technical Question. The notorious oil cooler housing was leaking so I changed it but never topped off the coolant after replacement (went from being above MAX level line to just a little bit above MIN line). Now, could not topping off the coolant level back to where it was …Last year, two-thirds of China's overseas direct investment went to Europe. Late last week, Germany was surprised to learn that a little-known Chinese automaker had become the bigg...自動コード. P0128 JEEP - サーモスタット合理性. Posted on 行進 2024. 著者: Eric Farmer. 作成日: 3 行進 2021. 更新日: 9 行進 2024. ビデオ: DTC P01282.4Lジープダッジクライスラーのサーモスタットを交換する方法。. ACがオンのときに過熱します。.The Jeep JK code P0128 is a Diagnostic Trouble Code (DTC) that indicates a problem with the Engine Coolant Temperature (ECT) sensor or thermostat. This …Find the latest Highland Global Allocation Fund (HGLB) stock quote, history, news and other vital information to help you with your stock trading and investing. Dividend HGLB annou...Nov 14, 2023 · HI @Jonathan, The P0128 code is very common. Your Cherokee's computer knows how long it should take for the car to warm up. Using the sensors that measure the air temp (ambient) as well as the temperature of the coolant, if the computer finds a deviation from what it expects or the value is completely out of bounds from what it should be (rationality), it illuminates the CEL and saves a P0128 ... The most common symptom of a P0128 trouble code in a Jeep Wrangler is an illuminated malfunction indicator lamp (MIL). Other symptoms may include poor engine performance and a decrease in fuel economy. 1. Lack of heat– The most prominent symptom of the P0128 trouble code in the Jeep … See moreJoin the next Future of Travel webinar, as Brian Kelly sits down with an executive from Hyatt to discuss hotel loyalty and wellbeing in the pandemic era. The ongoing coronavirus pa... P0128 Jeep Wrangler coolant sensor replace diy. Code P0128 could be either the thermostat or the coolant sensor .Today I replaced the coolant sensor on our 2... Don't forget to disconnect the battery while you replace the sensor (or for 10-15 minutes). This will reset the P0128 code. Otherwise, it will take several normal drive cycles for the CEL to go out. Good luck :thumbsup: ...Sometimes, the more you see, the less you understand... I miss my Jeep. On the hunt for a …"Chinese people can also save the world." In the film Wolf Warrior 2, Leng Feng, a former special forces operative, is on a one-man mission to save Chinese nationals and innocent l...730 posts · Joined 2009. #18 · Jan 22, 2012. P0128 is when your engine temp drops below the desired operating temp and only happens when you don't let your engine warm up to at least 110 deg. I have a SRT8 so it may differ at bit, i'm not sure, but whenever i got that code, it was because i didn't let the engine warm up and the coolant wasn't ...Apr 4, 2023 · 1) Warm engine up for five minutes (must reach closed loop) 2) Drive (with steady throttle) at a speed between 40 and 60 mph for 8 minutes. 3) Stop and idle for 3 minutes. 4) Drive (with steady throttle) at a speed above 20 mph for 2 minutes. 5) Turn key off, leave off for ten minutes (to run O2 sensor heater monitor). Feb 17, 2021 ... ... P0128 Thermostat Rationality Test. In short, it means that ... jeep can low coolant cause p0128 code ... how to reset p0128 code how to fix p0128 ...For troubleshooting the P0128 code in your Jeep Wrangler, follow the steps as mentioned below: Manage an OBD-II scanner. Plug the scanner in the port, which is placed above the pedals on the left side of your Jeep Wrangler. Put the key to turn on the vehicle and then press the Read button on the scanner. Press on the Erase or Clear …P0128 code (thermostat) after changing oil cooler housing. Technical Question. The notorious oil cooler housing was leaking so I changed it but never topped off the coolant after replacement (went from being above MAX level line to just a little bit above MIN line). Now, could not topping off the coolant level back to where it was …Jan 7, 2023 · P0128 is a generic powertrain code that means the engine control module (ECM) detected that the motor hadn’t reached its required operating temperature within the required timeframe set by the manufacturer. This timeframe depends on other facts, such as ambient temperature. P0128 2017 jkur. Have a p0128 on 2017 jkur. Temp on dash and jscan showing 185F driving to lunch just now, 12 miles at 55-60 mph in 55F ambient so plenty of time to warm up and get stable. I am thinking thermostat held open. Seems like my 2013 jkur runs around 198F but haven’t double checked yet.Pulled the code and yup, P0128. Heat is working great so I cleared the code since the light just irritates me and have been looking for the best place for the mopar part . Then today, low 40s and a strong headwind again and it came back on. ... It was a used 2014 Jeep Wrangler but I love her. She is a bright gold with …Don't forget to disconnect the battery while you replace the sensor (or for 10-15 minutes). This will reset the P0128 code. Otherwise, it will take several normal drive cycles for the CEL to go out. Good luck :thumbsup: ...Sometimes, the more you see, the less you understand... I miss my Jeep. On the hunt for a …Nov 10, 2021 · Now, the description of P0128 is the engine takes too long to warm-up. Its an emissions requirement, because the engine makes more emissions while its cold, so the Federal Gov mandates it has to warm-up within a certain amount of time. So the first assumption would be its the thermostat. P0128 JEEP Possible Causes. Leaking or stuck open thermostat. Low engine coolant level. Insufficient warm up time. Faulty engine coolant temperature sensor. Engine coolant temperature sensor harness open circuit or short circuit to ground or voltage from wire damage or insulation damage. Engine coolant …The most common symptom of a P0128 trouble code in a Jeep Wrangler is an illuminated malfunction indicator lamp (MIL). Other symptoms may include poor engine performance and a decrease in fuel economy. 1. Lack of heat– The most prominent symptom of the P0128 trouble code in the Jeep … See more** Click "Show More" to Learn more about this video **=====Check out our NEW Website for 2023!!https://www.milehighcampers...Feb 11, 2024 · 1. Check Coolant Levels. Low or weaker coolant levels can trigger the P0128 code in your Jeep Grand Cherokee because it can alter the engine running temperature, causing it to deviate from its ideal operating temperature. This can be detected by the engine coolant temperature sensor, which sends signals to the engine computer (PCM) about the ... Feb 11, 2024 · For troubleshooting the P0128 code in your Jeep Wrangler, follow the steps as mentioned below: Manage an OBD-II scanner. Plug the scanner in the port, which is placed above the pedals on the left side of your Jeep Wrangler. Put the key to turn on the vehicle and then press the Read button on the scanner. Press on the Erase or Clear button and ... Jay2011JK. Welcome to the Forum.. on the oil change -- it is possible (probably) that the shop did not reset the system .. do you recall if the % was near that before the change. Also, it appears you might have an Axle seal seeping.. the P0128 does indicate thermostat .. a change includes the housing and thermostat.Check engine light code P0128 on a Jeep. J... @HowIFixedIt Replacing thermostat and housing on a Jeep. 2014 Jeep Grand Cherokee thermostat location replacement.It will come up with P0128 thermostat rational... If the check engine light is on in your jeep, dodge, chrysler, ram, I'll bet it's for this super common issue. It will come up with P0128 ...However, before you replace your entire thermostat, inspect these other areas as well. Low engine coolant can alter the engine running temperature enough to …Jan 29, 2021 ... We got this 2015 jeep wrangler here with check engine light code p0128 Thermostat below temp. I will show you step by step how to change the ...Mar 25, 2022 · Build Thread 2006 Rubicon, Black, 4.0, auto trans, mods slowly in progress, flairs removed (ripped one off mall crawling) DOM:12/2005 Emerald Coast Jeepers member since Oct 2022 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. Past experience indicates that the most likely solution is to replace the thermostat.Theory of Operation for P0128: The PCM predicts what the engine coolant temperature should be, based on the engine coolant temperature at start-up, ambient temperature and how the vehicle is subsequently driven. ... A forum community dedicated to Jeep Commander owners and enthusiasts. Come join the discussion about lift kits, …Aug 22, 2020 · P0128 and dealer repair. My 2012 JGC with the 3.6L engine just lit up a CEL with a code P0128. Based upon the postings here, it seems pretty common that the thermostat needs to be replaced. I purchased the thermostat at the dealer today and was pretty shocked by the $75 (out the door) price. tmoca Discussion starter. 77 posts · Joined 2010. #1 · Oct 27, 2021. Okay, so my engine light came on today. Stopped by the auto parts store to have the code checked. Came back P0128 stating coolant temp below regular temp. So the guy suggested a thermostat said it is quite common. I also snagged some coolant …One common reason for the P0128 code to appear on a 2015 Jeep Grand Cherokee is a faulty thermostat. This issue can cause the engine coolant to not reach the proper temperature, triggering the code. Other possible causes include a malfunctioning engine coolant temperature sensor or a problem with the cooling system.The P0128 code on a 2015 Jeep Wrangler indicates a potential issue with the engine coolant temperature (ECT) sensor. This subheading will delve into the details of …Jay2011JK. Welcome to the Forum.. on the oil change -- it is possible (probably) that the shop did not reset the system .. do you recall if the % was near that before the change. Also, it appears you might have an Axle seal seeping.. the P0128 does indicate thermostat .. a change includes the housing and thermostat.All was well. Fast forward to now - The P0128 Code came back up along with the P2181 and the P0118 Code. The Check Engine Light is on, and the temperature gauge is showing very low temp and the fan is constantly running. Sometimes the engine doesn't start right away, but 99% of the time, it starts and …Sirius satellite radio is available in many new cars, including Jaguar, Mazda, Ford, Jeep, Chrysler, Dodge, Mercedes-Benz, BMW, Volvo, Volkswagen and Audi vehicles. If your new car...Its a 10mm and about 2 minutes of time to unhook a battery cable, thermo was stuck wide open as they are designed to fail that way and not closed. Heater will cook a steak with a new one installed. Reset it and forget about it, ive done a few of these over the years, always a p0128 especially if you let it idle before you drive it.Aug 22, 2022 · For the first time that I can recall Rubi started throwing an error code. After several months I decided to fix it. Originally I was told it was the cooling ... P0128 es un código de avería OBDII relativamente común. Se activa cuando tu Jeep Wrangler la temperatura del refrigerante del Jeep Wrangler no alcanza la temperatura de funcionamiento adecuada. Es un código genérico de la cadena cinemática, lo que significa que, independientemente de quién haya fabricado el vehículo, tendrá el mismo ... Aug 22, 2022 · For the first time that I can recall Rubi started throwing an error code. After several months I decided to fix it. Originally I was told it was the cooling ... 2017 Jeep Renegade OBDII Code P0128 - Coolant Temperatore Below Thermostat Regulating temperature Weather during readings - Sunny, 38F outside Weather during first check engine light appearance - Sunny, 34F outside I am trying to diagnose the exact cause of the issue at present. When driving, the engine hit 65C after 5 minutes and 88C after 35 ... The P0128 code on a 2015 Jeep Wrangler typically indicates a problem with the engine coolant temperature. To fix this issue, it is recommended to first check the coolant level and ensure it is at the proper level. If the coolant level is low, topping it off may resolve the issue. However, if the coolant level is fine, the thermostat may need to ... Fixing P0128 in the Jeep Compass is usually a pretty easy thing to do since, 90% of the time, a stuck thermostat will cause the problem. Here are the most common causes of P0128: Thermostat Stuck Open – Far and away, the most typical cause for the P0128 code is a thermostat that is stuck open. When a thermostat is stuck open, it allows ...Don't forget to disconnect the battery while you replace the sensor (or for 10-15 minutes). This will reset the P0128 code. Otherwise, it will take several normal drive cycles for the CEL to go out. Good luck :thumbsup: ...Sometimes, the more you see, the less you understand... I miss my Jeep. On the hunt for a …The most common symptom of a P0128 trouble code in a Jeep Commander is an illuminated malfunction indicator lamp (MIL). Other symptoms may include poor engine performance and a decrease in fuel economy. Lack of heat– The most prominent symptom of the P0128 trouble code in the Jeep Commander is the lack of heat. When the thermostat …Jan 3, 2023 · How to change the thermostat on the 2015-2022 Jeep Grand Cherokee 3.6L v6. Check engine code P0128. IG: Ljs_Garage_ Aluminum flywheel Aluminum drive shaft ECU flash tuner Cold air intake Large bore throttle body The 5.7 HEMI engine is available in the Dodge, Chrysler and Jeep vehicles, making it...To reset the p0128 code on a jeep wrangler, disconnect the battery for a few minutes and then reconnect it. When the code reappears, it indicates a persistent issue …Every week, we share a number of downloads for all platforms to help you get things done. Here were the top downloads from this week. Every week, we share a number of downloads for...P0128 code. I know the fix for the code is 99% of the is a new tstat but I just wanted to ask why the code is causing no effect on the system. The vehicle heats up to normal temp, heat blows and runs fine. The code is tripped because "engine has not reached the required temperature level within a specified amount of time". Time is the factor.Did you ever want to be a personal-finance advice columnist? Here’s your chance. In Money’s “Readers to the Rescue” department, we publish questions from readers… By clickin...Mar 17, 2018 · Follow up to the original question. My CEL has been on for a few days. Finally scanned last night and got the same code P0128. Coolant was pretty low, but not below the add line. I went ahead and topped off the coolant. Was hoping that's the simple fix before replacing the thermostat. The jeep is running fine, all the temperatures seem normal.

Jan 29, 2015 · P0128 code. I know the fix for the code is 99% of the is a new tstat but I just wanted to ask why the code is causing no effect on the system. The vehicle heats up to normal temp, heat blows and runs fine. The code is tripped because "engine has not reached the required temperature level within a specified amount of time". Time is the factor. . Top rated trucks

jeep p0128

Theory of Operation for P0128: The PCM predicts what the engine coolant temperature should be, based on the engine coolant temperature at start-up, ambient temperature and how the vehicle is subsequently driven. ... A forum community dedicated to Jeep Commander owners and enthusiasts. Come join the discussion about lift kits, …Fixing Jeep engine code P0128 Depending on the root cause, fixing engine code P0128 on a Jeep may involve replacing a faulty thermostat, topping up the coolant levels, replacing the engine coolant temperature sensor, or repairing any issues with the cooling system. It’s recommended to consult a certified mechanic for accurate diagnosis and ...Feb 17, 2021 ... ... P0128 Thermostat Rationality Test. In short, it means that ... jeep can low coolant cause p0128 code ... how to reset p0128 code how to fix p0128 ...In-depth coverage and articles from Quartz about Emails - How To. AdvertisementThere are seven Jeep models as of 2015, including the Compass, Cherokee, Grand Cherokee and Patriot. The other models are the Wrangler, Wrangler Unlimited and the Renegade. Each Je...Jan 21, 2021 ... Overview on how to replace the thermostat on 2012 - 2017 Jeep Wranglers with 3.6L engine. This had the P0128 code.We found a couple of Chrysler technical service bulletins for several Jeep and Dodge models that recommend reprogramming the PCM (engine computer) if the code P0128 is diagnosed. Another Chrysler TSB for 2009-2010 Dodge Challenger and 2008-2010 Dodge Magnum/Charger and Chrysler 300 describes a problem where the thermostat …Using the MotoLogic software, we priced out a thermostat replacement service for a 2020 Jeep Wrangler. This is a common issue seen on the 3.6-liter V6 engine …Jan 29, 2021 ... We got this 2015 jeep wrangler here with check engine light code p0128 Thermostat below temp. I will show you step by step how to change the ...Dec 15, 2011 · P0128 Thermostat Rationality. P0128 JEEP. Description. Indicates that the thermostat monitor has not achieved the required engine operating temperature within a specified amount of time after starting the engine. Symptoms- CEL. Possible causes. - Insufficient warm up time. - Low engine coolant level. - Leaking or stuck open thermostat. There are seven Jeep models as of 2015, including the Compass, Cherokee, Grand Cherokee and Patriot. The other models are the Wrangler, Wrangler Unlimited and the Renegade. Each Je...P0128 can be caused by a bad thermostat OR the Coolent Temperature Sensor being faulty. After much research, I decided it was the sensor, not the thermostat. Depending on whether you have a 3.6 or 3.8, the sensor is either right next to the thermostat (replace from above) or in the block near the firewall on the driver's side (replace through ...One common reason for the P0128 code to appear on a 2015 Jeep Grand Cherokee is a faulty thermostat. This issue can cause the engine coolant to not reach the proper temperature, triggering the code. Other possible causes include a malfunctioning engine coolant temperature sensor or a problem with the cooling system.JEEP CHEROKEE CODE P0128 ENGINE LIGHT ON 2014 2015 2016 2017 2018 2019 2020If you have Jeep Cherokee and you have Code P0128 and your engine light is on we w...After 500 Miles. You should only travel with the DTC code p0128 for 500 miles. During the distance, the car will not have much damage and risks. However, some people would travel more than 500 miles, which may cause car problems. It is not safe to go more than 1000 miles.Nov 5, 2018 · The most common symptom of a P0128 trouble code in a Jeep Liberty is an illuminated malfunction indicator lamp (MIL). Other symptoms may include poor engine performance and a decrease in fuel economy. Lack of heat– The most prominent symptom of the P0128 trouble code in the Jeep Liberty is the lack of heat. When the thermostat doesn’t bring ... How to Diagnose P0128 Thermostat Issues on a Jeep? When your Jeep has a P0128 code, use these steps to diagnose the root cause:. Use an …How to replace a thermostat. 2.4L, & 2.0L. 2014-2018 Jeep Cherokee, and 2013-2016 Dodge dart uses the same part. Same engine. Car had check engine light on. ...The P0128 code in your 2014 Jeep Grand Cherokee indicates a potential issue with the engine coolant temperature (ECT) sensor or thermostat. To diagnose the cause, you can perform the following steps: 1. Start by checking the coolant level and make sure it is at the proper level. 2..

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