Jeep error code p0128 - Feb 22, 2024 · The P0128 code can be set while the PCM is monitoring engine warm-up. The PCM draws from a few key pieces of data during this time to maximize engine efficiency, including the Engine Coolant ...

 
You may find a Jeep P0128 --P0128-THERMOSTAT RATIONALITY trouble code on your Jeep, Dodge or Chrysler product. Home; Make & Model; Repair Topics; More Articles. Alex's Tips for Teens; All about mechanics and shops; ... To determine when to set the Jeep P0128 trouble code, .... Dominican beauty salon richmond va

3299 posts · Joined 2015. #4 · Nov 10, 2021. Thermostat stuck open. The first time mine did it, I just erased the DTM. P0128 is a permanent code, and will stay in the system until it completes so many cycles without detecting the low coolant temp. That said, after mine set the code again, I replaced the thermostat. hasn't been back on since.Jan 27, 2024 · P0128 is a trouble code often associated with a malfunctioning thermostat. ... or a Jeep, the P0128 code is likely to appear once your coolant thermostat or ... OBD II codes or Diagnostic Trouble Codes (DTCs) are one of the most common ways for mechanics to identify and diagnose car issues quickly. One such code is P0128, which has been reported to be a common issue in Jeep Grand Cherokees. In this post, we will look at what P0128 is, its causes, and how to troubleshoot and fix the issue.Mar 1, 2014 ... A P0128 is a code is an indication of a faulty thermostat or ECT (engine coolant temp sensor). The manufacture designs the engine to run at ...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 coolant temperature sensor.WK2 -Trouble Shooting/Problems/Service ... Engine temp 120 p0128 code. ... Just bought a 2015 jeep grand Cherokee last week with 99k miles. It is the 3.6L v6.What the P0128 code means. The P0128 code means that the engine coolant is not getting warm enough, fast enough. In other words, there is a problem with the engine operating temperature not being reached within a certain amount of time. The Engine Control Module (ECM) determines this length of time based on ambient temperature.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.How to diagnose Jeep engine code P0128 To diagnose engine code P0128, a mechanic may use an OBD-II scanner to retrieve the trouble code and check the engine coolant temperature sensor readings. They may also inspect the thermostat, coolant levels, and overall cooling system for any signs of malfunction.The P0128 code and what it means for your car. The P0128 code is a diagnostic trouble code (DTC) for "Engine Coolant Temperature Below Thermostat Regulating Temperature." This code indicates that the engine coolant temperature is not getting hot enough, fast enough. The thermostat is designed to open at a specific temperature to allow coolant ...When it comes to diagnosing engine problems in a Dodge, error codes can be a great tool to help you understand what is going on. Error codes are the first step in diagnosing any en...Causes of Jeep engine code P0128 There are several potential causes for engine code P0128 on a Jeep, including a malfunctioning thermostat, low coolant levels, a faulty engine coolant temperature sensor, or a problem with the engine’s cooling system.. Effects of Jeep engine code P0128 When the engine coolant temperature is not …Consumers of products and services might want to have some assurances that the prices they are about to pay are correct and fair. Many people have access to superstores and online ...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 coolant temperature sensor.The P0128 is a diagnostic trouble code (DTC) for malfunction in coolant thermostat – coolant temperature below the thermostat regulating temperature. In simple terms, when …What is P0128 Jeep JK Diagnostic Code? This is a DIY video for Jeep JK Thermostat Replacement...Parts:1) Mopar Thermostat w/housing - https://www.amazon.com...When it comes to troubleshooting my Jeep and understanding error codes, one of the common issues that I have encountered is the P0128 error code. This code,The most common symptom of a P0128 trouble code in a Jeep Patriot 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 Patriot is the lack of heat. When the thermostat doesn’t bring ...237 posts · Joined 2015. #1 · Mar 7, 2017. Check engine light came on last Wednesday. 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. Engine light has not come back on and I've driven it a lot, enough to ...Quick, unedited cell phone video covering P0128 Data Trouble Code (DTC) on 2013 Jeep Wrangler JKUR w/3.6L V6 caused by a faulty thermostat tripping Check Eng... 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. May 9, 2022 ... P0128 Chrysler 3.2/3.6 Pentastar engine thermostat code, Top 3 causes · Comments192.Jeep Code P0128 means that your Engine Coolant Temperature is below the thermostat regulating temperature. Simply put, the coolant which helps regulate your engine’s temperature is colder than it should be. What happens as a consequence is that your engine will be running colder.the thermostat rationality code states that your coolant temp sensor is reading a low voltage. thermostat was possible stuck open. just replace it. but if you do replace it with a 180 degree it will still have the code. just pull the asd fuse and leave it out for 15 seconds to reset the dtc's.Jan 24, 2024 · How to diagnose Jeep engine code P0128 To diagnose engine code P0128, a mechanic may use an OBD-II scanner to retrieve the trouble code and check the engine coolant temperature sensor readings. They may also inspect the thermostat, coolant levels, and overall cooling system for any signs of malfunction. 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 thermostat and f...12136. 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.P0118 JEEP Code - Engine Coolant Temperature Sensor Circuit High P0128 JEEP Code - Engine Temperature takes to long to reach Operating Temperature For taking to long to warm up, the first thing everyone suspects id the thermostat, but in my experience if the engine is reaching full operating temp it isn't the thermostat, something is causing …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 ... Jeep Grand Cherokee P0128 Code. Cherokee fault p0335 codes crankshaft 02 jeep grand cherokee 4.7. dead miss started suddenly. have codes Jeep p0455 cherokee grand code7 posts · Joined 2010. #1 · Jan 26, 2011. I just received diagnostic code P0128 while driving home. From my search I understand it is an issue with the thermostat or coolant. Which makes sense as the following has played out in the last few days: 4 days ago I noticed my coolant level was about a half inch below the minimum line on the coolant ...Marissawalkerjones94 Discussion starter. 1 post · Joined 2020. #1 · Feb 3, 2021. I have a 2015 Jeep Wrangler with thermostat rationality throwing a code on my jeep. The tech said it could just be a sticking thermostat but upon reading it could be an engine coolant temp sensor. My temp runs normal on my jeep, & everything runs normal.Nov 5, 2018 · The most common symptom of a P0128 trouble code in a Jeep Patriot 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 Patriot is the lack of heat. When the thermostat doesn’t bring ... Jeep wrangler p0018: crank/cam position correlation – bank 2 sensor “a”2013 jeep wrangler code p0339 2013 jeep wrangler code p04562013 jeep wrangler code p0339. 2013 Jeep Wrangler Code P0339 Check DetailsThe P2183 fault code in automobiles can cause the following symptoms: Engine Light ON, Service Engine Soon Warning Light, engine overheating, poor fuel economy, rough idling, stalling, and reduced engine power. It can also cause the engine to run hotter than usual, and the coolant temperature gauge to fluctuate.The most common cause for the P0128 code on a Jeep Gladiator is a faulty thermostat. A faulty thermostat can be what is described as a "stuck open thermostat." Other issues can be low coolant, a bad radiator fan or water pump, an inaccurate engine coolant temperature sensor (ECT sensor), or a bad engine control module. Check Out The …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 …7 posts · Joined 2010. #1 · Jan 26, 2011. I just received diagnostic code P0128 while driving home. From my search I understand it is an issue with the thermostat or coolant. Which makes sense as the following has played out in the last few days: 4 days ago I noticed my coolant level was about a half inch below the minimum line on the 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. ... It's been a good vehicle except for a continued issue related to P0128 fault code. The code first showed up about a year and a half ago ...=====Claim your FREE engine code eraser 👉 https://free.nonda.co 👈=====Engine Code P0128 Saving Repair Part...Nov 5, 2018 · The most common symptom of a P0128 trouble code in a Jeep Patriot 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 Patriot is the lack of heat. When the thermostat doesn’t bring ... Apr 18, 2018 · Fault Code P0128 advice. Hi all... got a P0128 fault this morning. Using Torque and a cheap bluetooth OBD reader, Torque states: Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature). Ensured radiator and reservoir were appropriate levels (quick/easy fix). Tried the 3 trip reset afterwards, no change. Canon printers are known for their reliability and high-quality printing. However, like any electronic device, they may encounter issues from time to time. One common problem that ...53 posts · Joined 2010. #1 · Feb 15, 2022. Hi All, I have a 2013 Grand Cherokee Trailhawk with the 3.6 and got code p0128 when driving home around 30 miles this weekend. The code came on a few minutes after driving and had my scanner with me. The temp stayed around 195-200 the way home as per the digital guage. Dash guage …P0128 Jeep Wrangler thermostat and housing replace diy. Code P0128 could be either the thermostat or the coolant sensor .Today I replaced the thermostat on o...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. Amazon and others that sell OEM show ~$40 with free shipping.Matt Konkle. August 27, 2015. Tweet. Torque Staff Report. This method is used to retrieve OBD I and OBD II diagnostic trouble codes from your YJ, TJ, XJ, ZJ, and early WJ Jeep models. Insert the key into the ignition. Turn the ignition On-Off-On-Off-On within 5 seconds. Record the 2-digit DTC as displayed by the flashing MIL.What is P0128 Jeep JK Diagnostic Code? This is a DIY video for Jeep JK Thermostat Replacement...Parts:1) Mopar Thermostat w/housing - https://www.amazon.com...How to diagnose Jeep engine code P0128 To diagnose engine code P0128, a mechanic may use an OBD-II scanner to retrieve the trouble code and check the engine coolant temperature sensor readings. They may also inspect the thermostat, coolant levels, and overall cooling system for any signs of malfunction.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 ...Jan 24, 2024 · 2. Turn the ignition key to the “on” position without starting the engine. 3. Access the scanner’s menu and select “Read Codes” to retrieve the P0128 code. 4. After reading the code, select “Clear Codes” or “Erase Codes” option on the scanner to reset the code. 5. Jan 31, 2021 · Code P0128 came up and he told me he would need to replace the thermostat and housing since there were cracks and coolant was seeping. I tried reading up on the issue and watched some YouTube videos on how to replace so I am debating whether I should try to do the job myself or leave it to the mechanic. In this video, I'll explain what the P0128 Coolant Thermostat Error Code means when your check engine like goes on and you get this code. Another name is P01...1. P0300 – Random/Multiple Cylinder Misfire Detected: This code indicates that the engine is misfiring in multiple cylinders, causing poor performance and potential damage. It could be due to issues with the ignition system, fuel system, or even a vacuum leak. 2. P0128 – Coolant Thermostat (Coolant Temperature Below Thermostat …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.Causes of Jeep engine code P0128 There are several potential causes for engine code P0128 on a Jeep, including a malfunctioning thermostat, low coolant levels, a faulty engine coolant temperature sensor, or a problem with the engine’s cooling system.. Effects of Jeep engine code P0128 When the engine coolant temperature is not …Labor: 1.0. 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. 2. The next cause is a problem with the engine coolant temperature sensor or the wiring associated with the sensor. There are two main symptoms for the P0128 code: 1. Heater is not hot enough due to the coolant temperature in the engine being low 2. Car takes too long to warm up, or the temperature gauge does not go up as high as it used to. 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?Jun 17, 2023 · The most common cause for the P0128 code on a Jeep Wrangler is a faulty thermostat. A faulty thermostat can be what is described as a "stuck open thermostat." Other issues can be low coolant, a bad radiator fan or water pump, an inaccurate engine coolant temperature sensor (ECT sensor), or a bad engine control module. Check Out The Latest Price! Code p0128. Jump to Latest Follow ... Code p128 Coolnt thermostat Thermostat regulating Temperature Its been very cold last 10 days here first a bit better and bang check engine ... Find answers to all your Jeep Patriot technical questions. Show Less . Full Forum Listing.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 OBD2 Scanner Tool. Plug in a diagnostic scan tool to pull the P0128 code and any other related trouble codes from the engine control module (ECM). This will confirm the issue is a faulty thermostat regulation one.Marissawalkerjones94 Discussion starter. 1 post · Joined 2020. #1 · Feb 3, 2021. I have a 2015 Jeep Wrangler with thermostat rationality throwing a code on my jeep. The tech said it could just be a sticking thermostat but upon reading it could be an engine coolant temp sensor. My temp runs normal on my jeep, & everything runs normal.Nov 5, 2018 · The most common symptom of a P0128 trouble code in a Jeep Cherokee 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 Cherokee is the lack of heat. When the thermostat doesn’t ... P0128 Jeep Diagnostic Trouble Code (DTC) Definition, Causes and Diagnosis. Home JeepP0128 Jeep DTC P0128 Make: Jeep Code: P0128 Definition: Thermostat Rationality Description: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.Whirlpool washers are renowned for their durability and efficiency. However, like any electronic appliance, they can occasionally encounter errors that disrupt their normal functio...2. The next cause is a problem with the engine coolant temperature sensor or the wiring associated with the sensor. There are two main symptoms for the P0128 code: 1. Heater is not hot enough due to the coolant temperature in the engine being low 2. Car takes too long to warm up, or the temperature gauge does not go up as high as it used to.Jan 23, 2024 · So, buckle up and join us as we delve into the intricacies of Jeep code P0128 and how it affects your vehicle’s performance. Stay tuned for expert insights and practical tips on troubleshooting this common issue. What is Jeep code P0128? Jeep code P0128 refers to a diagnostic trouble code related to the cooling system of a Jeep vehicle. The Xerox N2125 fuser assembly should be replaced after every 200,000 page impressions. If your printing is high-demand, your fuser assembly may have a shorter lifespan. When your ...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.Jan 24, 2024 · 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 ... Back in the fall, the P0128 code came up and I changed the Termostat. 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 …MIAMI, Dec. 22, 2020 /PRNewswire/ -- According to a recent study from the National Institute of Health, adverse drug events (ADEs) may account for... MIAMI, Dec. 22, 2020 /PRNewswi...The P0128 code means that the engine coolant is not getting warm enough, fast enough. In other words, there is a problem with the engine operating temperature not being …Marissawalkerjones94 Discussion starter. 1 post · Joined 2020. #1 · Feb 3, 2021. I have a 2015 Jeep Wrangler with thermostat rationality throwing a code on my jeep. The tech said it could just be a sticking thermostat but upon reading it could be an engine coolant temp sensor. My temp runs normal on my jeep, & everything runs normal.Updated: July 31, 2021. The code P0128 - Coolant Temperature Below Thermostat Regulating Temperature means that the engine does not reach expected temperature after running for sufficient time, or in other words, it takes too long to warm up. Often this code causes the Check Engine light to come on and off in cold temperatures.Top Causes of a P0128 Code or a Radiator Fan That Won’t Turn Off. If there is an issue with any of these parts, the computer can turn the radiator cooling fans on high to prevent the engine from overheating. 1. Overheating Engine. The engine could be overheating from a problem with the cooling fans. This can be noticeable at idle, which is ...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 engine’s temperature.The MLB season is falling apart. The same fate will befall the NFL in September if it doesn't drastically reimagine its return protocol. The Major League Baseball season is falling...Jan 23, 2017 · 447 posts · Joined 2016. #2 · Jan 23, 2017. That code is usually displayed when the engine takes too long to reach operating temperature (thermostat stuck open). So, under certain conditions after you clear the code, depending on outside air temp, driving conditions, it may warm up within the parameters the computer is looking for, despite ... 576 posts · Joined 2014. #1 · Dec 21, 2016. 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'.If you own a Kenmore oven, you may have encountered error codes at some point. These error codes are designed to help you troubleshoot and fix any issues that may arise with your o...Matt Konkle. August 27, 2015. Tweet. Torque Staff Report. This method is used to retrieve OBD I and OBD II diagnostic trouble codes from your YJ, TJ, XJ, ZJ, and early WJ Jeep models. Insert the key into the ignition. Turn the ignition On-Off-On-Off-On within 5 seconds. Record the 2-digit DTC as displayed by the flashing MIL.Quick, unedited cell phone video covering P0128 Data Trouble Code (DTC) on 2013 Jeep Wrangler JKUR w/3.6L V6 caused by a faulty thermostat tripping Check Eng...

Do the following to fix Chevy code P0128. Check the coolant level: If the level is lower than the minimum, add more coolant and go for a short drive. If the code is still active, you must change the thermostat. Inspect the coolant temperature sensor: The primary coolant temperature sensor is in the cylinder head near the thermostat. . 10x boca raton reviews

jeep error code p0128

=====Claim your FREE engine code eraser 👉 https://free.nonda.co 👈=====Engine Code P0128 Saving Repair Part...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 P0128 code means that the engine coolant is not getting warm enough, fast enough. In other words, there is a problem with the engine operating temperature not being …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 ...MIAMI, Dec. 22, 2020 /PRNewswire/ -- According to a recent study from the National Institute of Health, adverse drug events (ADEs) may account for... MIAMI, Dec. 22, 2020 /PRNewswi...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.What the P0128 code means. The P0128 code means that the engine coolant is not getting warm enough, fast enough. In other words, there is a problem with the engine operating temperature not being reached within a certain amount of time. The Engine Control Module (ECM) determines this length of time based on ambient temperature.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.Jun 1, 2020 ... CODE P0128 P0126 DODGE DART, CHRYSLER 200, JEEP CHEROKEE COMPASS RENEGADE, RAM PROMASTER CITY, FIAT 500X, FIAT TORO If you have engine light ...The P0128 code can be set while the PCM is monitoring engine warm-up. The PCM draws from a few key pieces of data during this time to maximize engine efficiency, including the Engine Coolant ... P0128 isn’t the worst code out there, but you should still have a professional mechanic check your car ASAP. Doing so assures you that your vehicle is always operating at its best, while ... The P0128 is a diagnostic trouble code (DTC) for malfunction in coolant thermostat – coolant temperature below the thermostat regulating temperature. In simple terms, when …P0108 is a generic OBD-II trouble code. It indicates your Jeep Wrangler's MAP (manifold absolute pressure) sensor's voltage reading is outside of the normal operating range. The voltage is too high. It's most commonly caused by a bad MAP sensor, wiring issue, or vacuum leak. The MAP sensor measures the air pressure coming intoBefore you can reset the P0128 code in your Jeep Wrangler, it is essential to locate the OBD-II port. The OBD-II port is a standardized diagnostic interface that allows you to connect an OBD-II scanner to your vehicle. In most Jeep Wrangler models, the OBD-II port is conveniently located under the dashboard on the driver’s side. ...The Honda code P0128 indicates a problem with the engine coolant temperature sensor. It means that the sensor is reporting insufficient temperature increase during the engine warm-up period. This could be due to a malfunctioning sensor, a thermostat stuck in the open position, or a problem with the engine control module.Error code P0128 on your Jeep indicates a possible issue with the engine’s coolant temperature being too low. To diagnose and fix this, check the coolant level ….

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