Thermostat Rationality Jeep WranglerP0128 Thermostat Rationality Possible Causes Setting Conditions Check for low coolant level or for an incorrect coolant mixture Check the operation of the thermostat (it may be stuck open) ECT sensor connector is damaged (check pins for damage, and for moisture) ECT sensor has failed or is out-of-calibration PCM has failed. Set Condition: The PCM predicts a coolant temperature value that it will compare to the. Jeep Wrangler Thermostat Buy Online. B1403 - FRONT LEFT AUDIO SPEAKER OUTPUT CIRCUIT OPEN. The cost of diagnosing the P0128 Chrysler code is 1. With a Jeep P0128 code, the first step is to get it properly diagnosed to figure out what is causing the malfunction in the coolant temperature circuit. Mopar Thermostat for 07-11 Jeep Wrangler JK In Stock $47. Ask Your Own Jeep Question. Some of the most common symptoms of a bad thermostat are no heat, a spiked temp gauge, blown head gasket, and more. Jeep Wrangler JK Diagnostic Codes for 2007 to 2018 Reference August 27, 2015 Tweet To check your JK Codes, use this sequence on your ignition. 16K views 2 years ago 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. P0128-THERMOSTAT RATIONALITY Theory of Operation 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. Diagnose code P0128 Thermostat Rationality Step 1. 5 36 n° 3 3861 3460 2194 n° 4 2840 2535 2794. The tech said it could just be a sticking thermostat but upon reading it could be an engine coolant temp sensor. P050B Cold Start Ignition Timing Performance. Engine coolant temperature sensor circuit poor electrical connection. During diagnosis, DTC P0128 may be stored, indicating that “thermostat rationality has been set. B1407 - FRONT RIGHT AUDIO SPEAKER OUTPUT CIRCUIT OPEN. 147 people reported this problem 44 comments. P0128 Jeep Code - Thermostat Rationality Search P0128 Jeep Questions and Answers → Need More Information on the P0128 Jeep Code?. Jeep Cherokee Thermostat Replace P0128 Code Watch on So, two questions: 1. Since this often indicates a problem with the thermostat, regardless if you are driving a Dodge, a Ford, or a Jeep, the P0128 code is likely to appear once your coolant thermostat or temperature sensor fails. Find a complete list of Jeep Wrangler check engine light codes in this CJ’s article. Thermostat Housing. P0128-THERMOSTAT RATIONALITY When Monitored: Engine running. P0128 Jeep Wrangler | How To Replace Jeep Wrangler Thermostat | bleeding coolant system | Location - YouTube 0:00 / 12:37 Intro P0128 Jeep Wrangler | How To Replace Jeep Wrangler. JK Wrangler Technical Forum CEL0128, Thermostat Rationality Jump to Latest Follow 1 - 3 of 3 Posts O Old Scout Registered Joined Dec 14, 2019 14 Posts Discussion Starter · #1 · Jan 2, 2021 Just got CEL0128 on my 2006 Wrangler Sport. Jeep Wrangler Thermostat Replacement Cost The average cost of replacing a Wrangler thermostat is $375 the price range from $350-400 depending on the location, labour and where you purchase the parts Note about price: The estimate you see above may not represent your total cost, it may be higher or lower, it all depends. The tech said it could just be a sticking thermostat but upon reading it could be an engine coolant temp sensor. The thermostats open between 178 -180 degrees We have the killer glass radiator tubes on the 300 & Magnum and would start to see a trickle flow as low as 176 but always substantial movement by 178 For us, we have less than a quarter of a mile before getting onto a 65MPH highway. JeepCares · #3 · Jan 21, 2016 steveandtracy7 said: My 2012 grand Cherokee 3. Click to expand And if you can't find one with the air bleed (some have a "jiggle valve"), you can drill an 1/8" hole there and install with the hole up. JK Wrangler Technical Forum CEL0128, Thermostat Rationality Jump to Latest Follow 1 - 3 of 3 Posts O Old Scout Registered Joined Dec 14, 2019 14 Posts Discussion Starter · #1 · Jan 2, 2021 Just got CEL0128 on my 2006 Wrangler Sport. The other common reason for the CEL code P0128 is the Engine Coolant Temperature Sensor (ECT). Free In-Store or Curbside Pick Up. 16K views 2 years ago 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. Thermostat Operation. Mount the thermostat with the vent hole at the top so any trapped air can easily escape. 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. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Replace defective thermostat – $450-$600 Top off engine coolant level – $15-$45 Replace cooling fan – $550-$700 Replace coolant temperature (ECT) sensor – $150-$300 Replace intake air temperature (IAT) sensor – $75-$150 Repair/replace wiring – $50-$1,500 Mechanics Tips about the P0128 Code. 49 Gasket Or Seal Included: Yes Gasket Type: Gasket Color: Black Outlet Port Quantity: 1 Mounting Hardware Included: No Material: Plastic, Stainless Steel, Grade Type: Regular Duralast Thermostat 71403 Part # 72403 SKU # 686470 1-Year Warranty. ” This condition may be caused by the block retaining feature for the thermostat not holding the thermostat in place. Symptoms- CEL Possible causes - Insufficient warm up time - Low engine coolant level - Leaking or stuck open thermostat - Faulty MAP sensor. 28 ( 33%) Check the fit Add to Cart Fits the following Jeep Wrangler Years: 2020-2021 Jeep Wrangler | Rubicon 4WD, Sport 4WD, Unlimited Rubicon 4WD, Unlimited Sahara 4WD, Unlimited Sport 4WD | 6 Cyl 3. General Smog Check What is Trouble Code P0128 - Coolant Below Thermostat Regulating Temperature My car's check engine light is not on but I'm pulling a P0128 trouble code. This will ensure the engine reaches the optimal temperature within the set time to limit emissions. P0128-THERMOSTAT RATIONALITY For a complete wiring diagram, refer to the Wiring Information. The tech said it could just be a. Jeep Cherokee Thermostat Replace P0128 Code Watch on So, two questions: 1. The thermostats open between 178 -180 degrees We have the killer glass radiator tubes on the 300 & Magnum and would start to see a trickle flow as low as 176 but always substantial movement by 178 For us, we have less than a quarter of a mile before getting onto a 65MPH highway. B1405 - FRONT RIGHT AUDIO SPEAKER OUTPUT CIRCUIT LOW. My temp runs normal on my jeep, & everything runs normal. Discussion Starter · #1 · Feb 3, 2021 I have a 2015 Jeep Wrangler with thermostat rationality throwing a code on my jeep. Mahle Thermostat TI23695 Part # TI23695 SKU # 879967 Limited-Lifetime Warranty Check if this fits your 2016 Jeep Wrangler Application: OEM recommended temperature Notes: Engine Coolant Thermostat. 5184651AH Thermostat Housing for 2011-2015 Dodge Durango 2011-2020 Jeep Grand Cherokee 2012-2018 Jeep Wrangler, Engine Coolant Thermostat Replaces# 05184651AF,902-852,5184651AG,5184651AF,5184655AD. During diagnosis, DTC P0128 may be stored, indicating that “thermostat rationality has been set. It can be challenging to tell this in a vehicle that doesn’t have a temperature gauge. This causes the thermostat to tip into the engine block opening, allowing coolant to pass through without going through the. Jeep Cherokee Thermostat Replace P0128 Code Watch on So, two questions: 1. Diagnose code P0128 Thermostat Rationality Step 1. How to replace Thermostat? 2015 Jeep Wrangler A2Z Auto Masters 6. The PCM estimates what the coolant temperature should be. P0128 is calculated by time to reach a certain ect temperature from a given start up temp-. Have had CEL issue in past for 02 sensor but this is a new one. 5 (2) Accel Mr Gasket High Flow 195° Thermostat for Jeep Vehicles with 2. ** Click "Show More" to Learn more about this video **=====Check out our NEW Website for 2023!!https://www. Thermostat Housing Replace and Bleeding Air from Cooling System - 2015 Jeep Wrangler JK 3. P0128 Thermostat Code. P0128 Thermostat Rationality Possible Causes Setting Conditions. 79 OMIX 160° Thermostat for 72-01 Jeep CJ Series, Wrangler YJ and TJ $17. P0128-THERMOSTAT RATIONALITY When Monitored: Engine running. Labor: 1. P0128 Jeep Code - Thermostat Rationality Need more Information on the P0128 Jeep Code? Need more information on how to fix the P0128 Jeep code?. 49 Gasket Or Seal Included: Yes Gasket Type: Gasket Color: Black Outlet Port Quantity: 1 Mounting Hardware Included: No Material: Plastic, Stainless Steel, Grade Type: Regular Duralast Thermostat 71403 Part # 72403 SKU # 686470 1-Year Warranty. 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 the thermostat being open. P0128 sets when it takes longer than normal for the engine to reach operating temperature. If you need help convincing wife, I'll have mine talk to her Reply Save Like notajerryskid Discussion Starter · #11 · Apr 16, 2015 Jeepylit said:. The code is p0128 after looking it up it says thermostat rationality. STEP 4: REMOVE AND INSPECT THERMOSTAT. Start up coolant temperature less than 65°C (149°F). However, a damaged thermostat won’t typically cause any performance issues. Thermostat Rationality: P0129: Barometric Pressure Out‐Of‐Range Low:. I replaced the thermostat but the CEL is still on. Mount the thermostat with the vent hole at the top so any trapped air can easily escape. If your looking to replace your Jeep Wrangelr thermostat, stick with the mopar. 2020-2021 Jeep Wrangler THERMOSTA-THERMOSTAT Part Number: 4893926AG Vehicle Specific Replaced by: 4893926AH $49. hot stuff! BTW, I tried to clear the code and it keeps coming back on instantly, any idea why this happens? The coolant temp according to the dash is about 177 the gage is about a quarter. The engine temperature was not reaching normal operating temperature. This problem will prevent the engine from reaching normal operating temperature; a new thermostat should be installed. Genuine Mopar thermostats are the only ones guaranteed to work with your model, ensuring a proper fit and durable performance. B1402 - Front Left Audio Speaker Output Circuit High. ” This condition may be caused by the block retaining feature for the thermostat not holding the thermostat in place. P0128 Thermostat Rationality P0128 JEEP Description Indicates that the thermostat monitor has not achieved the required engine operating temperature within a. Below that I will also paste the fan clutch test procedure. Generally caused by a thermostat that is partially stuck open and/or low. Check for low coolant level or for an incorrect coolant mixture. My Mil light came on and the code is PO128, Thermostst Rationality? Jeep Mechanic: Randall J I had sent this: Hello, to put in simple terms? it means the computer is sensing low engine temp or possibley high temp. A leaking cooling system or a thermostat is most often the reason for the error code. Other than that I can copy and paste the P0128 code set criteria and you can read through it and see if you can pinpoint issues your Jeep might be having. The aftermarket parts don’t hold out. P0128-THERMOSTAT RATIONALITY Theory of Operation 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. Low engine coolant level. Jeep Wrangler P0128 Diagnosis An excellent way to tell if it’s a sensor issue or an issue with the thermostat is whether or not the Jeep Wrangler’s engine is running at its proper operating temperature. The most common reason for error code P0128 is a faulty engine coolant thermostat, so the first step in troubleshooting it is to see if it is open or leaking. P0128 Dodge Code - Thermostat Rationality | Need more Information on the P0128 Dodge Code? Need more information on how to fix the P0128 Dodge code? Get Access to Factory Service Manuals. Ambient temperature between -8°C (17. During diagnosis, DTC P0128 may be stored, indicating that “thermostat rationality has been set. just pull the asd fuse and leave it out for 15 seconds to reset the dtc's. P0128 is calculated by time to reach a certain ect temperature from a given start up temp- 30 years as a tech (ok- 24 since p0128 existed) and (85%) of the time it is a bad thermostat, 10% coolant leak (low coolant), 2-3% electrical and the rest "other" (bad pump etc). Ill have to research to see if there's 2 sensors? I checked the wiring and everything looked good grime what I could tell Click to expand I could be wrong, but I though there were two sensors. Your Jeep Wrangler relies on a thermostat to control the temperature of the engine. P0128 Chrysler Code - Thermostat Rationality Search P0128 Chrysler Questions and Answers → Need More Information on the P0128 Chrysler Code?. Jeep Wrangler P0128 Diagnosis An excellent way to tell if it’s a sensor issue or an issue with the thermostat is whether or not the Jeep Wrangler’s engine is running at its proper operating temperature. Engine coolant temperature sensor harness is open or shorted. The most common cause for P0128 is the engine coolant thermostat is stuck open. My MIL light came on. Leaking or stuck open thermostat. Note: There is no need to completely drain the engine coolant. 5184651AH Thermostat Housing for 2011-2015 Dodge Durango 2011-2020 Jeep Grand Cherokee 2012-2018 Jeep Wrangler, Engine Coolant Thermostat Replaces# 05184651AF,902-852,5184651AG,5184651AF,5184655AD 63 2 offers from $21. thermostat was possible stuck open. The leading cause of the code? 95% the thermostat needs to be changed. Insert Ignition Key Turn vehicle On-Off-On-Off. It's hard to feel the misfire when under throttle, but you can hear and feel the slight misfire trembles when at idle. The thermostats open between 178 -180 degrees We have the killer glass radiator tubes on the 300 & Magnum and would start to see a trickle flow as low as 176 but always substantial movement by 178 For us, we have less than a quarter of a mile before getting onto a 65MPH highway. I did that and the codes come back on after about 100 miles of driving. P0128 Thermostat Rationality Possible Causes Setting Conditions. Your thermostat is an essential component for regulating coolant temperature and checking for more serious issues with your engine. The best part is, our Jeep Wrangler Thermostat products start from as little as $6. A leaking cooling system or a thermostat is most often the reason for the error code. Application: OEM recommended temperature. Jeep Wrangler JK Diagnostic Codes for 2007 to 2018 Reference August 27, 2015 Tweet To check your JK Codes, use this sequence on your ignition. Start the engine and bring it up to operating temperature. When the coolant does not reach the optimum temperature, it can cause poor engine performance and bad fuel economy. B1405 - Front Right Audio Speaker Output Circuit Low. Most auto repairs shops charge between $75 and $150 per hour. BTW-you cant erase codes by disconnecting battery- that is pre 1995. I changed the temp sensor a about a months ago. 99 Gasket Or Seal Included: Y Start to Open Temperature: 203 $2999 Free In-Store or Curbside Pick Up SELECT STORE Home Delivery. P0128 Jeep Code - Thermostat Rationality Need more Information on the P0128 Jeep Code? Need more information on how to fix the P0128 Jeep code?. Inundaciones, deslizamientos y sismicidad en la cuenca del río Portoviejo (Manabí, Ecuador) y sus efectos ambientales: Un proyecto de investigación Williams Méndez Kervin Chunga Carlos Villacreses Edgar Menéndez Iván Zevallos Olga Briones César Palma UNIVERSIDAD TÉCNICA DE MANABÍ Instituto de Investigación Científica, Desarrollo y Transferencia Tecnológica Facultad de Ciencias. 30 years as a tech (ok- 24 since p0128 existed) and (85%) of the time it is a bad thermostat, 10% coolant leak (low coolant), 2-3% electrical and the rest "other" (bad pump etc). Jeep Wrangler Thermostat Buy Online. 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. I see this almost on a daily basis on these 3. The P0128 engine code indicates a problem with your car’s coolant thermostat, which is responsible for ensuring the engine warms up quickly enough after ignition to control emissions and fuel efficiency. Code P0128 Jeep Possible Causes. I have a 2015 Jeep Wrangler with thermostat rationality throwing a code on my jeep. P0128 Thermostat Rationality. Check if this fits your 2016 Jeep Wrangler. The code is p0128 after looking it up it says thermostat rationality. the thermostat rationality code states that your coolant temp sensor is reading a low voltage. Jeep Grand Cherokee Thermostat Replacement Cost The average cost for a Jeep Grand Cherokee Thermostat Replacement is between $408 and $428. To check your JK Codes, use this sequence on your ignition. Code P0128 Jeep Description Indicates that the thermostat monitor has not achieved the required engine operating temperature within a specified amount of time. P0128- Thermostat rationality IF your not first Your last!! Reply Save Like J Jeepylit · #10 · Apr 16, 2015 I think your jeep is asking for an LS3it will continue to misbehave until that happens. #2 · Jan 23, 2017 That code is usually displayed when the engine takes too long to reach operating temperature (thermostat stuck open). 97 Product Description Genuine Mopar Thermostat Housing Product information Technical Details Additional Information. 16K views 2 years ago 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. The thermostat rationality diagnostic runs during a drive cycle that starts with the coolant temperature below 140°F. My Mil light came on and the code is PO128, Thermostst Rationality? Jeep Mechanic: Randall J I had sent this: Hello, to put in simple terms? it means the computer is sensing low engine temp or possibley high temp. When Monitored and Set Conditions This diagnostic runs when the following conditions are met: With the engine running. P0128-THERMOSTAT RATIONALITY When Monitored: Engine running. Mechanic's Assistant: What's the year and model of your Jeep? 2012 Wrangler. Our online parts department has plenty in stock and available for direct shipping. P0128 Jeep Wrangler | How To Replace Jeep Wrangler Thermostat | bleeding coolant system | Location - YouTube 0:00 / 12:37 Intro P0128 Jeep Wrangler | How To. If everything goes according to plan, the hose will get quite hot. Find a complete list of Jeep Wrangler check engine light codes in this CJ’s article. Jeep Wrangler Thermostat Replacement Cost The average cost of replacing a Wrangler thermostat is $375 the price range from $350-400 depending on the location, labour and where you purchase the parts Note about price: The estimate you see above may not represent your total cost, it may be higher or lower, it all depends. Code P0128 Jeep Possible Causes. Find a complete list of Jeep Wrangler check engine light codes in this CJ’s article. This causes the thermostat to tip into the engine block opening, allowing coolant to pass through without going through the thermostat. #2 · Jan 23, 2017 That code is usually displayed when the engine takes too long to reach operating temperature (thermostat stuck open). A simple way to diagnose this is to feel the radiator hose and monitor how hot the temperature of the coolant is when it starts flowing through the radiator hose. 12/7/2020 Service Info • 28 - DTC-Based Diagnostics • 3. Check Engine Light Due to Failed Thermostat on Jeep Grand Cherokee Problem Description The thermostat may fail to close completely, causing the Check Engine Light to illuminate. The role of the thermostat is to prevent the coolant from entering the radiator until the engine reaches the right temperature. 6L o3djeeps 203K views 4 years ago P0128 2. B1409 - REAR LEFT AUDIO SPEAKER OUTPUT CIRCUIT LOW. Diagnose code P0128 Thermostat Rationality Step 1. Jeep Wrangler P0128 Diagnosis An excellent way to tell if it’s a sensor issue or an issue with the thermostat is whether or not the Jeep Wrangler’s engine is running at its proper operating temperature. I only have 16,000 miles on vehicle. However, a damaged thermostat won’t typically cause any performance issues. Your thermostat is an essential component for regulating coolant temperature and checking for more serious issues with your engine. Indicates that the thermostat monitor has not achieved the required engine operating temperature within a specified amount of time after starting the engine. ** Click "Show More" to Learn more about this video **=====Check out our NEW Website for 2023!!https://www. Jeep Wrangler JK Diagnostic Codes for 2007 to 2018 Reference August 27, 2015 Tweet To check your JK Codes, use this sequence on your ignition. B1402 - Front Left Audio Speaker. When it goes bad, you’ll experience a number of different problems. thermostat was possible stuck open. What are you working on today? Get an exact fit for your Jeep Wrangler Add a Vehicle 1-22 of 22 Results Items per Page Duralast Water Outlet with Thermostat 5180KT Part # 5180KT SKU # 932758 1-Year Warranty Check if this fits your Jeep Wrangler Free In-Store or Curbside Pick Up SELECT STORE. 49 OMIX Thermostat (195°F) for 72-06 Jeep CJ Series, Wrangler YJ, TJ, Cherokee XJ & Grand Cherokee ZJ $17. Another name is P0128 Thermostat. Your location and vehicle may affect the price of Thermostat Replacement. A healthy engine should run above 200 degrees. Thermostat Rationality: P0129: Barometric Pressure Out‐Of‐Range Low: P0131: O2 Sensor 1/1 Circuit Low: P0132: O2 Sensor 1/1 Circuit High: P0133: O2 Sensor 1/1 Slow. The most common cause for P0128 is the engine coolant thermostat is stuck open. Checked for codes and I have a PO 128 code, Thermostat Rationality. Shut it off and let it cool down, checking the level in the recovery tank an keep it above minimum. Code 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. I was always someone willing to give it a try, even if it took two to three times longer than having it professionally done, that's how I learned. B1406 - FRONT RIGHT AUDIO SPEAKER OUTPUT CIRCUIT HIGH. but if you do replace it with a 180 degree it will still have the code. The thermostat/housing job isn't too bad, however bleeding the cooling system can be tricky. It's hard to feel the misfire when under throttle, but you can hear and feel the slight misfire trembles when at idle. Ill have to research to see if there's 2. Diagnose code P0128 Thermostat Rationality Step 1. 00 5 (6) RIPP Superchargers 180 Degree Thermostat for 07-11 Jeep Wrangler JK with 3. When it comes to your Jeep Wrangler, you. P04FC Crankcase Ventilation System Performance. What Does the P0128 Jeep Code Mean? Indicates that the thermostat monitor has not achieved the required engine operating temperature within a specified amount of time after starting the engine. What does that mean? Mechanic's Assistant: How long have you had trouble with the light? 2-3 days. 5184651AH Thermostat Housing for 2011-2015 Dodge Durango 2011-2020 Jeep Grand Cherokee 2012-2018 Jeep Wrangler, Engine Coolant Thermostat Replaces# 05184651AF,902-852,5184651AG,5184651AF,5184655AD 63 2 offers from $21. 6 has had two codes PO440 and P0441 which are both evap codes. NOTE: If DTC P0456 is present, use the wiTECH Small Leak Verification Test (SLVT) todetermine if there is a leak in the system. P0128 is calculated by time to reach a certain ect temperature from a given start up temp- 30 years as a tech (ok- 24 since p0128 existed) and (85%) of the time it is a bad thermostat, 10% coolant leak (low coolant), 2-3% electrical and the rest "other" (bad pump etc). The thermostat rationality diagnostic runs during a drive cycle that starts with the coolant temperature below 140°F. Advance Auto Parts has 23 different Thermostat for your vehicle, ready for shipping or in-store pick up. Code P0128 Chrysler Description Indicates that the thermostat monitor has not achieved the required engine operating temperature within a specified amount of time after starting the engine. My A/C and heater are both working fine and the vehicle is not overheating. See more Reply Save Like A alm70. I'd fill the radiator up to the top of the neck, put the cap on and put the rest in the recovery tank. 6l Powertrain Control (PCM) Module • Diagnosis and Testing • P0128-Thermostat Rational. What Does the P0128 Jeep Code Mean? Indicates that the thermostat monitor has not achieved the required engine operating temperature within a specified amount of time after starting the engine. Duralast Gold Thermostat 15359DLG. You will lose a small amount during the thermostat housing R&R. Just got the same code, will order a thermostat and hopefully fix the problem thanks for the bleeding procedure. 4L Jeep thermostat UPDATES. An advantage in this day and age is the internet, and YouTube, something that didn't exist in my day. The store will not work correctly in the case when cookies are disabled. Insert Ignition Key Turn vehicle On-Off-On-Off-On Codes will be shown on the Odometer screen B1402 - Front Left Audio Speaker Output Circuit High B1403 - Front Left Audio Speaker Output Circuit Open. I replaced the thermostat but the CEL is still on. I have a 2015 Jeep Wrangler with thermostat rationality throwing a code on my jeep. What Does the P0128 Jeep Code Mean? Indicates that the thermostat monitor has not achieved the required engine operating temperature within a specified amount of time. STEP 4: REMOVE AND INSPECT THERMOSTAT. Check for low coolant level or for an incorrect coolant mixture; A forum community dedicated to Jeep Wrangler owners and enthusiasts. B1402 - FRONT LEFT AUDIO SPEAKER OUTPUT CIRCUIT HIGH. Set Condition: The PCM predicts a coolant temperature value that it will compare to the actual coolant temperature. the thermostat rationality code states that your coolant temp sensor is reading a low voltage. Thermostat Housing Replace and Bleeding Air from Cooling System - 2015 Jeep Wrangler JK 3. 49 OMIX 195° Thermostat for 03-06 Jeep Wrangler TJ and 02-05 Liberty KJ with 2. This diagnostic looks at the how cold the system is at start up, what the inlet air temperature is, and the amount of fuel burned during that drive cycle. Will it reset after several drive cycles or do I need to reset it manually? 2. Someone recommended I cleaning the gas cap and the fuel neck for proper sealing. The predicted engine coolant temperature is compared to the Engine Coolant Temperature Sensor reading. Notes: 203 °F (95 °C), Engine Coolant Thermostat Housing Assembly. 2020-2021 Jeep Wrangler THERMOSTA-THERMOSTAT Part Number: 4893926AG Vehicle Specific Replaced by: 4893926AH $49. Mahle Thermostat TI23695 Part # TI23695 SKU # 879967 Limited-Lifetime Warranty Check if this fits your 2016 Jeep Wrangler Application: OEM recommended temperature Notes: Engine Coolant Thermostat. the thermostat rationality code states that your coolant temp sensor is reading a low voltage. Symptoms of a Bad Thermostat: Jeep Wrangler. Possible Causes: LOW COOLANT LEVEL THERMOSTAT OPERATION SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE. Low coolant level If any ECT or AAT DTC are present, diagnose and repair those DTC before continuing with this test procedure. Faulty engine coolant temperature sensor. The thermostats open between 178 -180 degrees We have the killer glass radiator tubes on the 300 & Magnum and would start to see a trickle flow as low as 176. So, what does the code P0128 mean? You’ll likely see your malfunction indicator lamp illuminate. The FCM says V6 thermostat bolts are 106 in. Análisis del tránsito peatonal, alternativas y soluciones a congestionamientos en la Avenida América, entre Avenida Manabí y Calle Ramón Fernández. 4L Jeep thermostat UPDATES. 8L Engine Ships from 3rd Party $44. Check if this fits your Jeep Wrangler. 41K subscribers Subscribe 203 16K views 2 years ago We got this 2015 jeep wrangler here with check. I would definately replace the thermostat first. What I've tried so far: - New Spark Plugs: (2 set's - 6 NKG & 6 Champion) Properly Gapped - New Coils: MSD - New O2 Sensors (all 4 - both sides) - New Crankshaft Position Sensor - New MAP Sensor. The hole makes filling the system without an air bubble much easier. 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. When I called local dealership for. The thermostat/housing job isn't too bad, however bleeding the cooling system can be tricky. Codes will be shown on the Odometer screen. rlefig: Yes, P0128 is thermostat rationality. Low coolant level If any ECT or AAT DTC are present, diagnose and repair those DTC. A significant difference results in an error. Start the vehicle and place your hand on the radiator hose after it has been totally cooled down. Discussion Starter · #1 · Feb 3, 2021 I have a 2015 Jeep Wrangler with thermostat rationality throwing a code on my jeep. Labor costs are estimated between $76 and $96 while parts are priced between $332 and $332. The radiator cooling fan on some vehicles doesn’t even engage until after the coolant reaches nearly 230 degrees. Part # 82303DL. B1403 - Front Left Audio Speaker Output Circuit Open. How much will it cost to fix? Running a diagnostic for a P0128 will cost around one hour of labor, which may run you between $75 and $150. Thermostat Operation. When the coolant does not reach the optimum temperature, it can cause poor engine performance and bad fuel economy. STEP 4: REMOVE AND INSPECT THERMOSTAT. My temp runs normal on my jeep, & everything runs normal. P0128 Jeep Wrangler | How To Replace Jeep Wrangler Thermostat | bleeding coolant system | Location - YouTube 0:00 / 12:37 Intro P0128 Jeep Wrangler | How To Replace Jeep Wrangler. goodwrenchdave. P0128 Thermostat Rationality P0128 JEEP Description By 2005 Wrangler Rubicon in forum Wrangler and CJ Replies: 7 Last Post: 02-27-2011, 03:01 PM. Warning : Never open the cooling system when the engine is hot. P0128 Thermostat Rationality Possible Causes Setting Conditions Check for low coolant level or for an incorrect coolant mixture Check the operation of the thermostat (it may be stuck open) ECT sensor connector is damaged (check pins for damage, and for moisture) ECT sensor has failed or is out-of-calibration PCM has failed. Jeep Wrangler Thermostat Replacement Cost The average cost of replacing a Wrangler thermostat is $375 the price range from $350-400 depending on the location, labour and where you purchase the parts Note about price: The estimate you see above may not represent your total cost, it may be higher or lower, it all depends. To check your JK Codes, use this sequence on your ignition. 1803721 2 P0456 EVAP System Small Leak. Diagnostic Trouble Codes. Your thermostat is an essential component for regulating coolant temperature and checking for more serious issues with your engine. Reply Save Like d04srt4boy · #12 · Aug 7, 2009. Notes: 203 °F (95 °C), Engine Coolant Thermostat Housing Assembly. Come join the discussion about reviews, performance, trail riding, gear, suspension, tires, classifieds, troubleshooting,. revista riemat, julio-diciembre 2020.