Just bought a 2015 jeep grand Cherokee last week with 99k miles. It is the 3.6L v6. No check engine light when I drove off the lot. ... Got it checked and coded for P0128. Looked it up and sounds like a $50 fix up to a few grand. Started watching the temp gauge and stays below "healthy" range of 160-200°. It is staying right around 120 ... codes P013A and P0128 2007 Jeep Commander 5.7 Hemi My Jeep is throwing those codes, but only in cold weather. After the fist time the Check Engine light came on I had the coolant checked when I had an oil change. P0128特定メーカーの情報. P0128 ACURAクーラントシステムの故障. P0128 AUDIクーラント温度が動作範囲を下回っています. P0128 BMWサーモスタット低冷却液温度. P0128 BUICKエンジンサーモスタット調整温度以下の冷却剤温度. サーモスタット調整温度以下のP0128 CADILLAC ...P0128 problem code jeep. Introducir 81+ imagen engine code p0128 jeep wranglerJeep engine code p0128: (meaning, causes & fixes) Causes and fixes p0430 jeep wrangler – backyardmechanicP0128: low temp code incident. Introducir 81+ imagen engine code p0128 jeep wranglerP0128 code 2013 jeep wrangler … 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 thermostat rational... 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 …How to Diagnose and Repair a P0128 Code in a Jeep? Diagnosing and repairing a P0128 code in a Jeep can be a daunting task, but with the right knowledge and tools, it can be done. A P0128 code is an indication of an engine coolant temperature below the thermostat regulating temperature.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 ...Jan 24, 2020 · T. tonydee Discussion starter. 37 posts · Joined 2017. #1 · Jan 24, 2020. Hi, In my 2013 JKU (40,000 mi) I'm getting a P0128 code. This is happening frequently here in south east Pennsylvania in the winter. It did happen once in the summer. I keep clearing the code with my ODB II scanner. The temp is running 169-174 deg F according to the OBD ... 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... codes P013A and P0128 2007 Jeep Commander 5.7 Hemi My Jeep is throwing those codes, but only in cold weather. After the fist time the Check Engine light came on I had the coolant checked when I had an oil change. The P0128 fault code is a pretty common one, and there are a couple of things that cause it. If you’re dealing with a P0128 code, make sure to inspect the following things components. The first and most common cause for the P0128 code is a faulty thermostat. The thermostat can get stuck in an open position, preventing …The P0128 fault code is a pretty common one, and there are a couple of things that cause it. If you’re dealing with a P0128 code, make sure to inspect the following things components. The first and most common cause for the P0128 code is a faulty thermostat. The thermostat can get stuck in an open position, preventing …Jeep 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 …2016, 3.6 Check Engine light P0128 coolant temp code. ... A forum community dedicated to Jeep Wrangler owners and enthusiasts. Come join the discussion about reviews, performance, trail riding, gear, suspension, tires, classifieds, troubleshooting, maintenance, for all JL, JT, JK, TJ, YJ, and CJ models! ...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...Check Details How to fix jeep p0300 engine code in 3 minutes [2 diy methods / only $4. Jeep grand cherokee, customer states, check engine light on, p0128Introducir 81+ imagen engine code p0128 jeep wrangler How to fix jeep p0404 engine code in 3 minutes [2 diy methods / only $4Jeep getting check ivan 0l 2004 comes engine …2008 Jeep Liberty Auto Trans 1988 E-150 4.9L 5 Speed Stick God Bless Our Troops. ... I've got the P0128 Code. I ordered a digital laser infrared thermometer and will check the temp at the thermostat housing. I need the thermometer for other things, so the time was right ($14 on Amazon). I will check …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 …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 ...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 fitted to these Jeeps.Nov 5, 2018 · 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 doesn’t ... 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.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 bought this Jeep a couple weeks ago and it threw a CEL code P0128 (thermostat rationality). ... So, for anyone who reads this looking for a solution to a check engine light code P0128, replace the thermostat first (Part #5184651-AG), top off the coolant, make sure you bleed the air in the system well and then be patient. Side note, use the ...DDOG: Get the latest Datadog stock price and detailed information including DDOG news, historical charts and realtime prices. Indices Commodities Currencies StocksFeb 23, 2019 · ** Click "Show More" to Learn more about this video **=====Check out our NEW Website for 2023!!https://www.milehighcampers... P0128 Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature). 2017 Jeep Wrangler Unlimited - Answered by a verified Jeep Mechanic. ... A little low on coolant will not cause p0128. Most likely the thermostat is faulty. Ask Your Own Jeep Question.Chrysler Jeep Dodge of Paramus is located at 315 Route 4 West, Paramus, NJ 07652. Although Chrysler Jeep Dodge of Paramus is not open 24 hours a day, …2016 wrangler p0128. Got a 2016 wrangler with the 3.6l getting a code p0128. question the temp sensor cause it warms up fast and is normal on the gauge dash says 190 normal driving but got up to 220 today sitting and the fan never kicked on. Question is what is the normal operating temperature saw somewhere the fan won’t kick on till 240?"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...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 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 …Nov 6, 2020 ... P0128 #JEEP #WRANGLER A quick thermostat replacement how to for the Jeep Chrysler Dodge Ram 3.6L P0128 code check engine light.The intent of the P0128 Jeep code is to indicate a faulty thermostat. Similar codes: P0125 Jeep 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 ...However, before you replace your entire thermostat, inspect these other areas as well. Low engine coolant can alter the engine running temperature enough to …The P0128 fault code is a pretty common one, and there are a couple of things that cause it. If you’re dealing with a P0128 code, make sure to inspect the following things components. The first and most common cause for the P0128 code is a faulty thermostat. The thermostat can get stuck in an open position, preventing …P0128 Thermostat gasket/Housing replacement tutorial on a 2013 Jeep Wrangler 3.6 Don't forget to like and sub! Need help? Comment on what video we should fil...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.Um, yes. Monday morning, 9/12/22, on my way to work my check engine light came on. Panic mode. Got it diagnosed…..code p0128. Researched it as best I could. Low priority fix, thermostat most likely stuck open. Have driven it everyday to work since Mon day, appx 45 miles per day. Had to make a before work stop at Walmart this morning. codes P013A and P0128 2007 Jeep Commander 5.7 Hemi My Jeep is throwing those codes, but only in cold weather. After the fist time the Check Engine light came on I had the coolant checked when I had an oil change. How to Diagnose and Repair a P0128 Code in a Jeep? Diagnosing and repairing a P0128 code in a Jeep can be a daunting task, but with the right knowledge and tools, it can be done. A P0128 code is an indication of an engine coolant temperature below the thermostat regulating temperature.A coolant temp sensor is code 0118, after parts installation, I cleared the codes. Now check engine light came on within a few days of driving, P0128, T-stat stuck open, PO said he replaced with a new one, I went ahead and put in a non-valve SuperStant 195deg. Cleared codes.How to change thermostat on a 2006-2017 Dodge Jeep Chrysler Ram vehicles. P0128 code fixed.Coolant temperature over heating or temperature below operational,...The PCM trips the P0128 Code, which is what prompted me to change the thermostat in the first place. ... Also 05 5.7 Magnum modded the same as Jeep and, Recently Sold, 06 300CSRT8, Comp. Cam, 85 mm TB, HP tuned engine/trans, Foose custom wheels. Replaced with 2021 Tesla Model S Plaid with 1020 hp and 1050 lb. ft. of …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 Jeep Renegade (BU) is a subcompact crossover SUV from the Jeep division of Fiat Chrysler Automobiles. It is built in Melfi, Italy alongside the related Fiat 500X, with which it shares its platform. The Renegade is the first Jeep product to be produced exclusively outside of North America and will sell in South African, European, North ...P0128 2.4L Thermostat Replacement Done! ... Wife 201 7 Jeep Renegade Trailhawk 4x4 2.4L, 9 speed Auto. White Jeep Club Member # BU01. Reactions: Jacarandoso. Save Share. Reply Quote Like. This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.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, 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 ...Sep 19, 2023 · How to Diagnose and Repair a P0128 Code in a Jeep? Diagnosing and repairing a P0128 code in a Jeep can be a daunting task, but with the right knowledge and tools, it can be done. A P0128 code is an indication of an engine coolant temperature below the thermostat regulating temperature. The last two characters "28" are DTC numbers. OBD2 Diagnostic Trouble Code P0128 indicates that coolant temperature is below thermostat regulating temperature. When the engine first starts up, the engine coolant temperature (ECT) sensor and an intake air temperature (IAT) sensor both have similar temperature readings.Tools Used:Milwaukee 2767-20 M18 Fuel High Torque 1/2-Inch Impact Wrench https://amzn.to/INNOVA 3612 Milwaukee Electric Tools 2557-20 M12 Fuel 3/8" RATCHETht...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.Oct 27, 2021 · 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 to top it off, because I know I ... 107 posts · Joined 2013. #1 · Mar 23, 2015. I recently got a code "P0128 thermostat rationality" on my 2015 Jeep SRT. I first had a Jet 180 thermo and recently switched to a Mishimoto 180. Anybody else ever get this code? Is there a way to clear and see if it comes back without going to dealer? Like.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...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.12 days and 10 stages spanning 400km on jeep track, goat track...sometimes no track. IT SAYS SOMETHING about this race that none of the international riders who previously complete...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).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.To diagnose the P0128 Jeep code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.The people of Kerala, India are fantastic and welcoming. From the first day of my trip to the last, they continually proved just how amazing they are! Increased Offer! Hilton No An...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). It was a P0128 which is a coolant code.The engine wasn't getting to temperature. I change the thermostat and that to... We had a check engine light on the Jeep. P0128 is an extension of OBD-II code P0 which indicates a problem with your car’s coolant thermostat. P0 codes are displayed as P0XXX, with the third numeral in the code sequence signifying ... Nov 5, 2018 · Fixing P0128 in the Jeep Cherokee 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 …– Repair or replace the coolant temperature sensor: If the coolant temperature sensor is faulty, consider repairing or replacing it to ensure accurate temperature …All you want to do is view that PDF, but Adobe Reader takes forever to load, especially on an older PC. If an Adobe Reader alternative isn't a possibility for you, the Arsgeek webl...Mar 26, 2020 · 4 posts · Joined 2019. #1 · Mar 26, 2020 (Edited) I recently had an engine light come on in my 2013 Wrangler Sport, 2dr. 6 cyl. Code was P0128. I found the code issue. My coolant reservoir was low. No leaks found. I added fluid and cleared the code (disconnected the battery for an hour). No re emergence of the engine light yet, but I haven ... May 29, 2018 · I need to get my inspection done but my CEL was on with p0128 code. I replaced the thermostat, drove a couple days and the CEL went off. Continued to drive for a few more days. I still cannot get inspected (NY) because the vehicle is showing a P0128 as a "stored" code (using Foxwell NT201 OBD reader), even though the CEL is off. The P0128 fault code is the diagnostic trouble code (DTC) used by Dodge, Jeep, Ram, and numerous other manufacturers to signify that the coolant temperature in the engine is too cold for the thermostat to regulate.The P0128 engine code can result from numerous issues including a malfunctioning thermostat, a faulty coolant temperature …Nov 30, 2021 ... How to fix p0118 p0128 for 2012 jeep Wrangler Sport Engine Coolant Temperature Sensor thermostat How do I fix code P0118? codes P013A and P0128 2007 Jeep Commander 5.7 Hemi My Jeep is throwing those codes, but only in cold weather. After the fist time the Check Engine light came on I had the coolant checked when I had an oil change. 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。. 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 …12 days and 10 stages spanning 400km on jeep track, goat track...sometimes no track. IT SAYS SOMETHING about this race that none of the international riders who previously complete...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...Jeep renegade thermostat replacement P0128 jeep grand cherokee 2014 P0128 jeep cherokee 2.4l thermostat housing quick/easy tip. 2015 jeep cherokee 2.4l multiair p0128 thermostat? 2015 dodge journey code p0128Code p0128 p0126 dodge dart, chrysler 200, jeep cherokee compass Code p0128 jeep grand cherokeeJeep engine …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.
Post up what fixes your P0128 code. My Jeep just started throwing P0128 code. Most likely you still have AEM warranty. Original AEM warranty 48 months 48k miles from date of software update. AEM warranty got extended another 12 months 12k miles on the second software update. My 2015 Jeep AEM warranty expires in June of 2024.. Online ceramics silent hill
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. Fixing P0128 in the Jeep Renegade 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 ...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.Sep 29, 2015 · 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. 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 P0128 Code. Ok so the Code is reference to the Thermostat/Temp Sensor. I changed the Thermostat was broken when I pulled it out, put in an Aluminum thermostat not OEM part. Changed the Temp Sensor with an OEM part. Runs for as few hours then the Engine light comes back on, Turn the key three times to get the code P0128 then wait a minute or two ...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. 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. Conclusion — P0128 Jeep Code Guide. The P0128 Jeep code can be a frustrating issue for Jeep owners. But with a systematic approach and proper …The people of Kerala, India are fantastic and welcoming. From the first day of my trip to the last, they continually proved just how amazing they are! Increased Offer! Hilton No An...Jun 14, 2020 · To diagnose the P0128 Jeep code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour. Code was P0128. Checked YouTube and the internet and everything said replace the thermostat as it probable stuck open. Cleared the code. Ordered the part and Mopar replacement coolant. ... I've never seen the code yet, but my jeep runs between 80 - 88C (176 - 190F) , similar to my wife's van with the same …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. 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 … 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 ... 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. Cleared the code. mrpittman. •. So this code means one of two things, either the thermostat is bad but you changed it so now the sensor needs to be replaced. That will fix it, temp sensor drivers side of the block towards the back its going to make a mess because its at the lowest point but get your tools and clear an area and …P0128 2.4L Thermostat Replacement Done! ... Wife 201 7 Jeep Renegade Trailhawk 4x4 2.4L, 9 speed Auto. White Jeep Club Member # BU01. Reactions: Jacarandoso. Save Share. Reply Quote Like. This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.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..