How to reset p0128 code

Nov 14, 2022 · 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 to flow and to close when the engine has reached ...

Service Engine Soon – Other than the heater not working, the only other symptom of P0128 is typically the service engine soon light itself. Slight Decrease in fuel economy – The P0128 code may also lead to a slight decrease in fuel economy. This is because your F350’s engine is running at a cooler temperature than it should be.The most common cause for the P0128 code on a Dodge Charger 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 …Fixing P0128 in the Honda Ridgeline 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 ...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 ...Fixing P0128 in the Honda Pilot 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 ...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 ...Jul 31, 2021 · 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.Apr 24, 2013 ... I have a scan tool, so whenever the gauge isnt reading, I just hook it up and clear P0128 (does not always throw a check engine light, unless it ...

Possible Causes. NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes. Leaking or stuck open thermostat. Low engine coolant level. Insufficient warm up time. Faulty engine coolant temperature sensor. Engine coolant temperature sensor harness is open or shorted.Code P0128 Buick Description. The Engine Control Module ( ECM) monitors the temperature of the engine coolant for engine control and as enabling criteria for some diagnostics. The amount of heat an engine generates is proportional to the amount of air that enters the engine. The ECM monitors this amount of air to calculate a theoretical Engine ...Fixing P0128 in the Buick Lucerne 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 ...Table of Contents. Understanding the P0128 Code. The P0128 code is a diagnostic trouble code (DTC) that indicates a possible issue with the thermostat in your …=====Claim your FREE engine code eraser 👉 https://free.nonda.co 👈=====Engine Code CHEVROLET P0128 Saving ...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).If the engine isn't reaching or maintaining its target temperature, there may be a problem with the cooling fan, the intake air sensor, the coolant temperature sensor, or the thermostat. But you ...Fixing P0128 in the Cadillac CTS 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 ...

Parts I used:Jeep Grand Cherokee Thermostat https://amzn.to/2tHPqXiCheck Engine Light P0128 Jeep Grand Cherokee Thermostat Replace. Step by step how to. Part...Disconnect the radiator hose by loosening it from its retaining clip. Remove the two bolts that are mounted to the engine. Replace the thermostat gasket if needed. Torque the bolts before securing the coolant hose back to the retaining clip. Reset the check engine light to see if you have made a successful repair.In today’s article, we will be diving into the fascinating topic of the P0128 code in the Dodge Journey. This code, also known as the “Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)” code, can be a cause for concern among Dodge Journey owners. ... Resetting the P0128 code on a Dodge …JayTee2019. 4267 posts · Joined 2019. #58 · Jan 27, 2023 (Edited) This P0128 code and indication of an ECT sensor and/or failing thermostat have been showing up on other GM vehicles like the Colorado/Canyon and Camaro cars that use the same 3.6L LGX engines and same symptoms.

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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 coolant from ever reaching the optimal operating temperature. However, you should check the coolant level first as it can also trigger the P0128 fault code. While you’re at it, make sure that your car is ...Code P0128, Please, help. A month ago I had my engine light on with a code - P0128. The code refers to - something is wrong with cooling system (thermostat or temp sensor). My mechanic advised me to reset the engine light and see if it turns on again, because it could be some dirt or something got into and the light turns on.– Check and repair the radiator fan: If the radiator fan is not operating correctly, it may need repair or replacement to ensure proper cooling. – Perform a cooling system flush: If the coolant is dirty or contaminated, performing a cooling system flush can help improve its efficiency and prevent overheating.I hooked up my code reader and saw the P0128 code was pending and the AC wasn't blowing cold. I cleared it, everything started working fine. Every couple days, I'd get the same pop up and pending code. Clear it, all good. Since the code was pending, the check engine light never turned on. Last 2 weeks, no pending code, no pop up, no AC issues.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 ...FORD CODE P0126 P0128 FIX COOLANT TEMPERATURE BELOW THERMOSTAT REGULATING TEMPERATUREIf you have Ford car and you have engine light on and Code P0126 Insuff...

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 ...The Honda P0128 code indicates that the coolant thermostat temperature is below the regulating temperature. When a vehicle's engine reaches and maintains the correct temperature, the engine control module (ECM) records the time it takes. In order to maintain the efficient air-to-fuel ratio of 14.7:1, the powertrain control module enters a ...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 ...Fixing P0128 in the Cadillac SRX 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 …Due to factors beyond the control of RB The Mechanic, it cannot guarantee against unauthorized modifications of this information. RB The Mechanic assumes no ...There are 4 main common causes of P0128 Mercedes Benz and they are as follows: A Stuck open coolant thermostat. Bad wiring of the coolant temp circuit. A bad coolant temp sensor. Continuous and nonstop running of the radiator fan. Also read: 10w40 vs 5w40 which one is better for your Car.P0121 definition: Throttle Position Sensor (TPS) "A" Circuit Range Performance Problem. Issue Severity: HIGH - Stop driving immediately. Repair Urgency: Fix this code immediately (same-day if possible) to avoid being stranded. Diagnosis: It is important to complete the entire diagnostic process when diagnosing the P0121 code.Watch as I replace the thermostat on my 2015 Jeep Wrangler Unlimited after getting the P0128 Error Code.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 ...When your check engine light illuminates due to a problem related to a P0128 code, the issue is most likely related to one of the following culprits: A stuck opened thermostat; A bad coolant temperature sensor; Malfunctioning wiring in the cooling system circuit A missing thermostat How do I know if it’s the P0128 code? Symptoms of the …No other symptoms of a failed thermostat or cooling system leak - and my car has functioned perfectly for the past week since resetting the P0128 code. Before rushing to the dealer or panicking and spending hundreds and thousands of dollars - apply Occam's Razor and do the simplest most logical thing first. Reset the code and monitor the symptoms.I've been driving on a P0128 code for over a month now on my 2003 Vue 3.0L. I've been studying up to replace the thermostat, since I'm due for an Emissions test at the end of April. ... The SES light being reset manually along with several monitors not ready is the tell tale indication to emissions inspectors and anyone familiar with OBD II ...

Second local shop flushed the coolant reset the remaining oil life replaced the thermostat and housing and found a low oil pressure warning as well. He replaced the cheap oil filter the previous shop used and the thermostat and housing with OEM parts. ... That P0128 code is "thermostat rationality" or some such. To me, more indicative of a ...

Dec 2, 2012 · Used my ScanGauge II to read the P0128 code. Tried to reset the CEL. Failed. Then I bought an OBD2 scanner, Innovia 3030. Tried to reset the CEL. Failed. By now I have realized that the car does take a long time to warm up. Replaced thermostat. Now, seems to warm up more quickly.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 ...Taking several small trips could reset it. ... 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 ...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 ...With a P0128 code, the first step is to get it properly diagnosed to figure out what is causing the malfunction in the coolant temperature circuit. Using the live data function of the FIXD sensor and app allows you to read and analyze engine temperatures to properly diagnose a P0128 code. >Click here to get FIXD for just $19.99 for a limited time!Aug 15, 2023 · The P0128 diagnostic trouble code is often a result of a stuck engine coolant thermostat. Check the coolant hose and the temperature of the coolant flowing through it. Be careful when doing this to avoid burning. If the radiator hose takes more than 5 minutes to heat up, the thermostat is constantly open.Fixing P0128 in the Honda Pilot 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 ...

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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 ...P0128 - Thermostat Rationality. The P0128 code indicates a problem with the cooling system (coolant system). The engine control module notices that the engine temperature is below where it should be operating within a specified amount of time. The engine control module uses the engine coolant temperature sensor to monitor the engine's temperature.Fixing P0128 in the Cadillac SRX 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 …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...With our list of Blox Fruits codes, players can get free beli, an experience boost, or, on the odd occasion, a Blox Fruit stat reset code.All of these are essential to your time playing Blox Fruits! Most of these are double XP codes Blox Fruits players can enter for helpful boosts, so you can rank up even faster and make it to the Grand Line!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 Cadillac XT5 as any other vehicle). Coolant Temperature. The coolant temp sensor is responsible for telling the Engine Control Module (ECM) the engine’s coolant …Forgetting your account password can be a frustrating experience, but resetting your password doesn’t have to be difficult. Here are some easy steps to help you reset your account ...The P0128 is most commonly pointing to a fault in the Engine Coolant Temp (ECT) Sensor. When the Thermostat is at fault, more commonly, the code set is P0125. So with the P0128, I'd suggest starting at the ECT. Carefully inspect the electrical connector and as far up the harness as you can, looking for any loose, broken or damaged wires.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 ...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) …Step 7: Verify Code Reset. After resetting the P0128 code, it is important to verify if the code has been successfully cleared. Reconnect the OBD-II scanner to the OBD-II port and navigate to the “Read Codes” or “Retrieve Codes” function. Check if the P0128 code is still present.Service Engine Soon - Other than the heater not working, the only other symptom of P0128 is typically the service engine soon light itself. Slight Decrease in fuel economy - The P0128 code may also lead to a slight decrease in fuel economy. This is because your F350's engine is running at a cooler temperature than it should be. ….

Jan 26, 2011 ... Then, go for a 15 minute drive to allow the computer to re establish the various parameters. While idling you can reset the radio memories if ...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 ...Table of Contents. What Does the BMW P0128 Code Mean? Signs and Symptoms of BMW P0128 Code. Possible Causes of BMW P0128 Code. Fixes for BMW P0128 Code - Thermostat Low Coolant Temperature. How Much Will It Take to Fix the BMW P0128 Code? Possible Causes and Fixes of Code P0128 - Thermostat Low Coolant Temperature.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 ...It was slightly low and the technician replaced the radiator cap and reset the codes. A few days later the check engine light came on. I c... 2006 Dodge Stratus. 2.4 code P0128 The code P0128 came up so I changed the thermostat, housing and coolant temperature sensor. The same code came up and my car cut off while driving.A scangauge2 would reset the code, so would unhooking the battery, warranty is good to 36000, dealer should diagnose and fix, might be $ for the diagnose but the fix should be free. ... Code P0128 A little background. My 2016 Ram eco blew the engine, after 75 days I got my new engine (35600 mi om original engine) and it ran for 3400 miles ...Fixing P0128 in the Kia Sportage 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 ...DTC P0128 Circuit Description An engine coolant temperature (ECT) sensor monitors the temperature of the coolant. This input is used by the powertrain control module (PCM) for engine control and as an enabling criteria for some diagnostics. The air flow coming into the engine is accumulated and used to determine if the vehicle has been driven within the conditions that would allow the engine ...Thermostat stuck open. If the engine coolant level is low. Malfunction in the Engine Coolant Temperature (ECT) sensor. Insufficient warm-up time. What are the symptoms of the … How to reset p0128 code, What did you do to reset the engine code, so that the 'service engine soon' light would shut off? I seem to have the same problem and am thinking about DIY, but I haven't been able to figure out how to get rid of the light once the thermostat is replaced. FWIW, I have a 2001 E46 coupe, and the light came on last Friday., Nov 5, 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 ..., 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)., Ahhhhh another bulletproof GM 3800!Owner says the Check Engine light is on, and he wants it fixed.But before we throw any parts at it, let's diagnose it righ..., 2014 Jeep Wrangler sport unlimited 4x4changing those things should get rid of a check engine code p0128 code "coolant temp below thermostat"Changing out bad ..., Jan 24, 2024 · – Check and repair the radiator fan: If the radiator fan is not operating correctly, it may need repair or replacement to ensure proper cooling. – Perform a cooling system flush: If the coolant is dirty or contaminated, performing a cooling system flush can help improve its efficiency and prevent overheating., 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 ..., Fixing P0128 in the Suzuki Vitara 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 ..., Apr 24, 2013 ... I have a scan tool, so whenever the gauge isnt reading, I just hook it up and clear P0128 (does not always throw a check engine light, unless it ..., Nov 5, 2018 · Fixing P0128 in the Honda Civic 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 ..., 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. Symptoms of P0128 Code. How to Diagnose the P0128 Trouble Code? How Serious is the P0128 Code? What repairs can fix the P0128 Code?, =====Claim your FREE engine code eraser 👉 https://free.nonda.co 👈=====Engine Code P0115 Saving Repair Parts..., 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 ..., 1. Understanding the Basics of OBD-II Codes and P0128 OBD2 Code. 2. Decoding the P0128 Code: What It Means for Your Car. 3. The Impact of the P0128 …, Fixing P0128 in the Buick Enclave 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 ..., Share. mrpittman. • 2 yr. ago. 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 you'll be fine ..., 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 coolant from ever reaching the optimal operating temperature. However, you should check the coolant level first as it can also trigger the P0128 fault code. While you’re at it, make sure that your car is ..., Dec 28, 2011 ... you could have a 160 or 180 tstat or a stock one that has failed in the open position. "The PCM predicts what the engine coolant temperature ..., How to Fix P0128. Start with the easiest repair solution, which is low coolant levels. Before you start, turn off your engine and wait until it's sufficiently cool to open your coolant reservoir. Under normal operation, a coolant system is pressurized. Opening a hot coolant system could cause burns and other injuries if you aren't careful., When you unplug the erg, that is permanently stored in the trucks ecm. "Permanent" simply means that that is considered a hard fault, which cannot be reset via OBD - it must pass the self test to clear, which is what you saw occur. 2011 2WD 2500 Crew Cab ST w/8' bed, bone stock and staying that way . . ., Jun 9, 2020 · JayTee2019. 4267 posts · Joined 2019. #58 · Jan 27, 2023 (Edited) This P0128 code and indication of an ECT sensor and/or failing thermostat have been showing up on other GM vehicles like the Colorado/Canyon and Camaro cars that use the same 3.6L LGX engines and same symptoms., 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 Hummer H2 as any other vehicle). Coolant Temperature. The coolant temp sensor is responsible for telling the Engine Control Module (ECM) the engine's coolant temperature., So, I had my mechanic change out my thermostat to fix my P0128 code i’ve been getting on my reader as well as the check engine light it causes. Unfortunately after this repair, my check engine light STILL POPPED. I noticed when I checked the Freeze frame, this code popped because my engine temperature was 160 after 7 minutes of driving on the highway! Is it my temperature sensor or is ..., JayTee2019. 4267 posts · Joined 2019. #58 · Jan 27, 2023 (Edited) This P0128 code and indication of an ECT sensor and/or failing thermostat have been showing up on other GM vehicles like the Colorado/Canyon and Camaro cars that use the same 3.6L LGX engines and same symptoms., 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 …, Jun 1, 2021 · 3 posts · Joined 2019. #1 · Jun 1, 2021. Hello all, 2014 2500 3.6L Gas HR 254,000mi. Throwing a P0128 code (Coolant Temperature Below Thermostat Regulating Temperature) I bought a new Thermostat at AutoZone and 2 gallons of Mopar pre-diluted 10-year Oat Coolant. Planning on draining the coolant, replacing the Thermostat, and topping up., The P0128 diagnostic trouble code is often a result of a stuck engine coolant thermostat. Check the coolant hose and the temperature of the coolant flowing through it. Be careful when doing this ..., Jul 30, 2016 ... I then replaced the thermostat, but the light still comes on after 2 days each time I reset it. Do you think it's a bad new temp. sensor or ...?, Otherwise, you can pull and ECM fuse in the underhood fuse box and reset the P0128 code as well. Then the fan won't run wild on you. 2019 Acadia SLT-1 FWD Smokey Quartz Metallic 3.6L V6. Cocoa & Ash Gray Leather Interior Build Date: 4-11- 2019. . . Purchased 6-22- 2019 15,180 Mi 2-09-2024. Save Share., A. If you get a Check Engine Light (CEL) warning on your dash that says "Check Emission System" and the code returned is "P0128 Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)". If you don't have a code reader, you can go to your local parts store and they will read and tell you the code for free., Step 7: Verify Code Reset. After resetting the P0128 code, it is important to verify if the code has been successfully cleared. Reconnect the OBD-II scanner to the OBD-II port and navigate to the “Read Codes” or “Retrieve Codes” function. Check if the P0128 code is still present., 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 Toyota Tacoma as any other vehicle). Coolant Temperature. The coolant temp sensor is responsible for telling the Engine Control Module (ECM) the engine's coolant temperature., 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 ...