P0128 jeep - The most common causes include: Thermostat That’s Stuck Open – The most common cause of code P0128 is a leaky or stuck engine coolant thermostat. Faulty Engine Coolant Temperature Sensor – Faulty wiring or a bad sensor can also lead to a P0128 code reading. Radiator Fan Malfunction – Your car’s radiator fan helps cool the engine and ...

 
Modern versions of the Jeep include the Grand Cherokee, Wrangler, Compass, Patriot and Renegade. There have been many different model types of Jeep produced since its invention dur.... Costco gasoline simi valley ca

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.Fixing P0128 in the GMC Acadia 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 …"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...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 ...P0128 Coolant Thermostat: Coolant Temperature Below Thermostat Regulating Temperature. Jump to Latest Follow 11K views 8 replies 5 participants last post by striker_1818 Nov 30, 2019. bocajoe Discussion starter 11 posts · Joined 2017 Add to quote; Only show this user #1 ... The P0128 code is a generic OBD-II diagnostic trouble code, which indicates that the engine’s temperature is operating below the manufacturer’s recommended threshold for a specific period. The computer system in your vehicle continuously monitors the engine’s temperature to maintain optimal performance and prevent any damage. A P0128 code in a Jeep is caused by an engine coolant temperature (ECT) sensor that is not reaching the predetermined temperature within a certain amount of time. You’ll also notice this in other vehicles besides Jeeps, such as the P0128 code in a Honda Civic. The ECT sensor monitors the engine’s operating temperature and sends a signal to ...How to Fix a Dodge, Chrysler & Jeep P0128 engine code: Thermostat Rationality or Coolant thermostat – coolant temperature below the thermostat regulating tem...What does the first digit of the code mean. P0128 has a code description as well. P stands for PowerTrain. 0 is Generic. 128 - Potential problem with the engine coolant …Causes. Possible causes of OBD code P0128 Porsche. A code P0128 Porsche 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.Cambio de termostato Jeep Grand Cherokee código de avería P0128, #p0128, #Termostato, #Jeep, #JeepGrandCherokee,You may find a Jeep P0128 –P0128-THERMOSTAT RATIONALITY trouble code on your Jeep, Dodge or Chrysler product. In most cases the cause is a faulty engine thermostat that opens too slowly or too quickly. To determine when to set the Jeep P0128 trouble code, the PCM tries to predict what engine coolant temperature should be based …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 ...May 2, 2023 ... Due to factors beyond the control of RB The Mechanic, it cannot guarantee against unauthorized modifications of this information. 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. Sep 30, 2022 · To diagnose the P0128 Cadillac 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 most common symptom of a P0128 trouble code in a Dodge Challenger 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 Dodge Challenger is the lack of heat. When the thermostat doesn ...Trouble code P0128 is a sign of a faulty thermostat or low coolant levels. Learn how to diagnose, fix and prevent this issue with your engine thermostat and coolant system. Find out the common symptoms, likely causes and how to fix this code with OBD readers and scan tools.Fixing P0128 in the Hummer H3 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 coolant ...May 31, 2021 ... In this video, we replace the thermostat in a 2015 Jeep Grand Cherokee because of a code P0128. Pretty easy job as long as you don't break ...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 …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 ...Nov 10, 2018 · 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 coolant to flow through the engine at all times. When this happens, the engine is “over-cooled” and never reaches the proper operating ... Feb 22, 2022 ... Replacing the thermostat and housing. Part number: 0518 4651 AH P0128 trouble code When you click on links to various merchants on this site ...Feb 22, 2024 · P0128: Coolant Thermostat (Below Regulating Temperature) ... Using the MotoLogic software, we priced out a thermostat replacement service for a 2020 Jeep Wrangler. This is a common issue seen on ... I dropped off my Renegade for this issue and my first oil change (mileage 4601). I picked up this morning at 10 am, paperwork states malfunction indicator lamp is on, found fault code P0128 logged indicating an issue detected in the thermostat system. Performed software upgrade on the PCM per TSB# 18-061-16.P0128 Definition: Coolant Temp – Below Thermostat Regulating Temp. The P0128 OBD-II trouble code is a generic powertrain diagnostic code (it has the same meaning for the Ford F350 as any other vehicle). Coolant Temperature. The coolant temp sensor is responsible for telling the Engine Control Module (ECM) the engine’s coolant …CKE CUSTOMER STATES THE CHECK ENGINE LIGHT IS ON. CHECK AND REPORT. 453 WEXP (N/C) PARTS: 0.00 LABOR: 0.00 OTHER: 0.00 TOTAL LINE A: 0.00. 9993 SDS TEST CODE PO 12800 R48 THERMOSTAT PERFORM TEST THERMOSTAT. HEATING ELEMENT OK PASS PERFORM AL20.10-P-063817 …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 coolant to flow through the engine at all times. When this happens, the engine is “over-cooled” and never reaches the proper operating ...Nov 6, 2018 · The most common symptom of a P0128 trouble code in a Jeep Grand 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 Grand Cherokee is the lack of heat. When the thermostat ... p0128 code won't clear ... 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. ... So I actually purchased the jeep through a local toyota delaership and got the used car warranty. They are the ones that had replaced the thermostat twice now. Im assuming …Dec 7, 2023 · A P0128 code in a Jeep is caused by an engine coolant temperature (ECT) sensor that is not reaching the predetermined temperature within a certain amount of time. You’ll also notice this in other vehicles besides Jeeps, such as the P0128 code in a Honda Civic. The ECT sensor monitors the engine’s operating temperature and sends a signal to ... Code P0128 2013 JK. Checked my coolant level in the radiator and had to add a little. Overflow bottle was normal level. After a drive I discovered a very small leak coming from under the radiator cap. I replaced the cap with the latest upgrade, 17 PSI cap which is down from the original 18 psi cap. After a couple of short trips of 12 miles CEL ...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 coolant to flow through the engine at all times. When this happens, the engine is “over-cooled” and never reaches the proper operating ...Learn how to diagnose and fix the common Jeep error code P0128, which indicates a problem with the engine coolant temperature. Find out the possible …The Jeep Grand Cherokee is one of the most iconic vehicles on the road today. For decades, it has been a symbol of adventure and freedom, and now it’s getting an all-new makeover f...How to fix p0118 p0128 for 2012 jeep Wrangler Sport Engine Coolant Temperature Sensor thermostatHow do I fix code P0118?What repairs can fix the P0118 code?R...Methods to Fix P0128 Engine Code. Method A – The ECT Sensor. – Check the wiring and connections of the ECT sensor. – Test the resistance of the ECT sensor. – Replace the ECT sensor if necessary. Method B – The Thermostat. – Check the thermostat for proper operation. – Test the thermostat using a temperature gauge.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 coolant to flow through the engine at all times. When this happens, the engine is “over-cooled” and never reaches the proper operating ... 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. 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. Fixing P0128 in the GMC Acadia 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 coolant ...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.Jul 1, 2023 · Learn what P0128 means for your Jeep and how to troubleshoot it. This code indicates a problem with the coolant temperature circuit, which can affect your engine performance and efficiency. What benefit does the mockingbird get from copying another bird's calls? HowStuffWorks talks to the bird experts to find out. Advertisement What do Arkansas, Florida, Mississippi, ...Causes. Possible causes of OBD code P0128 Porsche. A code P0128 Porsche 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.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.Nov 6, 2018 · Fixing P0128 in the Ford F250 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 coolant ... 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. OBD2 Code P0128 BMW 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. The intent of the P0128 BMW code is to indicate a faulty thermostat. Similar codes: P0125 BMW In determining the engine did not reach a “normal ...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.Learn what a code P0128 means for your Jeep and how it affects your engine performance and fuel economy. Find out the common causes and solutions for this issue, such as coolant level, …Fixing P0128 in the Ford F250 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 coolant ...The P0128 code can also be triggered by malfunctions in the engine coolant temperature sensor or its circuit. If the sensor is sending incorrect readings to your engine control module, it may think that the engine is running at a lower temperature than it actually is. This can cause the P0128 code to be triggered.The P0128 OBD II trouble code indicates that your Jeep Wrangler’s engine coolant temperature has not reached its required operating temperature within a certain amount of time after starting the vehicle. This code can appear as soon as you start your vehicle, or it can also occur while driving.Causes of P0128 Code. 1) Faulty Thermostat. 2) Insufficient Coolant. 3) Bad Coolant Temperature Sensor. 4) Damaged Wires. 5) Faulty Radiator Fan. 6) Bad Intake Air Temperature Sensor. 7) Coolant Flow Restriction. 8) Contaminated Coolant.Please help support this channel by any means such as word of mouth, sharing the links, or by donations. For donations please click on: https://www.paypal.me...The Jeep Grand Cherokee is one of the most iconic vehicles on the road today. For decades, it has been a symbol of adventure and freedom, and now it’s getting an all-new makeover f...Dec 13, 2022 · 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 coolant to flow through the engine at all times. When this happens, the engine is “over-cooled” and never reaches the proper operating temperature. How to Replace a Thermostat (video). Key Takeaways: The P0128 code indicates a problem with the coolant thermostat.; Understanding the meaning, diagnosis, and repair options for this code is crucial for quick and efficient resolution. The common causes of the P0128 code include a faulty thermostat, low coolant levels, and a malfunctioning coolant temperature sensor.; Diagnosing the …Repair Costs for P0128. Fixing the P0128 engine code may cost roughly $150-$500 based on your car’s make and model, the repairs, labor rates, etc. For instance, replacing the ECT sensor may cost $200-$400. This includes labor, typically around $100-$150, and the cost of the sensor itself, which can range from $5-$250.If you own a Jeep, it’s crucial to stay informed about any potential recalls that may affect your vehicle’s safety and performance. One of the most effective ways to do this is by ...I dropped off my Renegade for this issue and my first oil change (mileage 4601). I picked up this morning at 10 am, paperwork states malfunction indicator lamp is on, found fault code P0128 logged indicating an issue detected in the thermostat system. Performed software upgrade on the PCM per TSB# 18-061-16.Jan 12, 2024 · Methods to Fix P0128 Engine Code. Method A – The ECT Sensor. – Check the wiring and connections of the ECT sensor. – Test the resistance of the ECT sensor. – Replace the ECT sensor if necessary. Method B – The Thermostat. – Check the thermostat for proper operation. – Test the thermostat using a temperature gauge. Sep 30, 2022 · To diagnose the P0128 Cadillac 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. 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.So, I got that P0128 code that indicates a bad thermostat. Deleted the code, went on a drive again. Code is off, stays off.Need the car to be reliable, decid...The cost to diagnose the P0128 GMC code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.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...Learn what P0128 code means, how to diagnose and fix it, and how much it costs. P0128 code indicates that the engine coolant temperature is below the regulating temperature, which can affect the fuel system and the engine performance.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 ...The Jeep Grand Cherokee is one of the most iconic vehicles on the road today. For decades, it has been a symbol of adventure and freedom, and now it’s getting an all-new makeover f...Jul 1, 2023 · Learn what P0128 means for your Jeep and how to troubleshoot it. This code indicates a problem with the coolant temperature circuit, which can affect your engine performance and efficiency. 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 … 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. Jul 1, 2023 · Learn what P0128 means for your Jeep and how to troubleshoot it. This code indicates a problem with the coolant temperature circuit, which can affect your engine performance and efficiency. 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, … 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. Meaning. In essence, the P0128 trouble code means that the engine coolant is not getting warm enough, quickly enough. What this boils down to is that there is a problem with the engine not reaching its operating temperature within a certain amount of time. The engine control module ( ECM) is what determines and governs the length of time that ...Watch as I replace the thermostat on my 2015 Jeep Wrangler Unlimited after getting the P0128 Error Code.AUBURN HILLS, Mich., Jan. 18, 2022 /PRNewswire/ --New factory-backed, Wi-Fi-capable, Level 2 (240-volt), at-home, hybrid-electric-vehicle, wall ch... AUBURN HILLS, Mich., Jan. 18, ...P0128 Definition: Coolant Temp – Below Thermostat Regulating Temp. The P0128 OBD-II trouble code is a generic powertrain diagnostic code (it has the same meaning for the Ford Expedition as any other vehicle). Coolant Temperature. The coolant temp sensor is responsible for telling the Engine Control Module (ECM) the engine’s …Fixing P0128 in the Nissan Murano 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 ...

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. ... 2008 wk gc overland, jeep green, 2006 kj liberty limited diesel, atlantic blue, 2003 kj liberty renegade, bright silver all working .... Dr. samuel kotoh

p0128 jeep

The Honda Code P0128 is a diagnostic trouble code that indicates a problem with the engine coolant temperature sensor or thermostat. This code means that the engine is not reaching the proper operating temperature within a specified time frame. This issue can result in decreased fuel efficiency, poor engine performance, and increased emissions.First, check the coolant level in your vehicle. If it’s low, top it off to the recommended level. A common cause of the P0128 code is a faulty coolant thermostat. It’s essential to replace the thermostat if it isn’t functioning properly. This is typically a straightforward repair that doesn’t take very long.Repair Costs for P0128. Fixing the P0128 engine code may cost roughly $150-$500 based on your car’s make and model, the repairs, labor rates, etc. For instance, replacing the ECT sensor may cost $200-$400. This includes labor, typically around $100-$150, and the cost of the sensor itself, which can range from $5-$250.2006 Jeep Grand Cherokee WK 3.7L - SOLD (lil bro's) 2007 Jeep Grand Cherokee WK 4.7L -SOLD 2011 - Mazdaspeed3 - Cornfed /GTX3076/CP Pistons/Carrilo Rods/CPE FMIC/ JBR WP 3.5/FREEK'DThe most common symptom of a P0128 trouble code in a Jeep Grand 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 Grand Cherokee is the lack of heat. When the thermostat ...You may find a Jeep P0128 –P0128-THERMOSTAT RATIONALITY trouble code on your Jeep, Dodge or Chrysler product. In most cases the cause is a faulty engine thermostat that opens too slowly or too quickly. To determine when to set the Jeep P0128 trouble code, the PCM tries to predict what engine coolant temperature should be based …CKE CUSTOMER STATES THE CHECK ENGINE LIGHT IS ON. CHECK AND REPORT. 453 WEXP (N/C) PARTS: 0.00 LABOR: 0.00 OTHER: 0.00 TOTAL LINE A: 0.00. 9993 SDS TEST CODE PO 12800 R48 THERMOSTAT PERFORM TEST THERMOSTAT. HEATING ELEMENT OK PASS PERFORM AL20.10-P-063817 …Please help support this channel by any means such as word of mouth, sharing the links, or by donations. For donations please click on: https://www.paypal.me...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.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.Fixing P0128 in the Nissan Altima 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 ...Feb 22, 2022 ... Replacing the thermostat and housing. Part number: 0518 4651 AH P0128 trouble code When you click on links to various merchants on this site ...P0128 code is a common problem related to the coolant temperature in vehicles like Honda Civic, Hyundai Accent, Jeep Wrangler, and Chevys. This guide will include all possible causes of the P0128 trouble code and will walk you through all troubleshooting techniques to get rid of this problem.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 coolant to flow through the engine at all times. When this happens, the engine is “over-cooled” and never reaches the proper operating temperature. How to Replace a Thermostat (video)..

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