thermostat rationality code p0128

P0128: JEEP - Thermostat Rationality. Nevertheless, you should be extremely careful when doing this as you could be burned. P0128-THERMOSTAT RATIONALITY Theory of Operation The thermostat rationality diagnostic runs during a drive cycle that starts with the coolant temperature below 140°F. What is meant by "I burped the radiator"? Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) What the P0128 code means. The owner came up plugged in his reader and sure enough Code P0128 came up. P0128 CHRYSLER Meaning Indicates that the thermostat monitor has not achieved the required engine operating temperature within a specified … I changed the temp sensor a about a months ago. To start viewing messages, select the … Be certain to check the Radiator cap, flow through the Radiator and anything that can cause a lack of system pressure or lack of coolant flow in the system. Check Engine Light Code: P0128 Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) Replace Thermostat: the new thermostat will come with the thermostat housing and the sensor all in one. The P0128 code means that the engine coolant is not getting warm enough, fast enough. Set Condition: The coolant temperature does not rise by a calibrated amount over a calibrated amount of time. ... 58042-p0128-thermostat-rationality-fault.html . When the correct engine operating temperature is reached, the powertrain control module orders the fuel system to enter “closed loop” where readings from the oxygen sensors are used to maintain the efficient air to fuel … Engine Code - P0128 (Thermostat Rationality) If this is your first visit, be sure to check out the FAQ by clicking the link above. Diagnose code P0128 Thermostat Rationality, P06DD Engine Oil Pressure control circuit stuck off, P06DA Engine Oil Pressure control circuit, P06DE Engine Oil Pressure Control Circuit Stuck On, C2116 JEEP, DODGE, CHRYSLER ABS Pump Supply Low Voltage, U0151-Lost Communication with Occupant Restraint Controller (ORC), C123F-Steering Angle Sensor comparative performance. Once the engine reaches its operating temperature, the thermostat opens. P0128 Description The thermostat is a component that blocks the flow of coolant to the radiator until the engine has warmed up. It just means that the PCM is … Remove battery drain cooling system from the bottom of rad, (coolant drain) Bolt OFF, and ON, and then purge the air from the system, (Burp system) by letting … P0128 code definition. Jeep P0128 Diagnose and fix Jeep P0128. This conclusion is reached based on the intake air temperature sensor reading, the length of time your vehicle has been runni… It is triggered when your Jeep Grand Cherokee‘s coolant temperature fails to reach the proper operating temperature. Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) What the P0128 code means. You may have to register before you can post: click the register link above to proceed. October 16, 2013, wednesday early evening, east of the pacific ocean, selectee for truly random and boring Parking lot photo of the moment grand platinum prize winner! Thermostat … Discussion Starter • #1 • Feb 16, 2013 ... Had ~16K on mine when this code first popped up, but had noticed it never getting up normal temp on the gauge for about 3 weeks prior. Low engine coolant level 2. DTC P0128: THERMOSTAT RATIONALITY WARNING: When the engine is operating, do not stand in a direct line with the fan. Posted and Edit by AutoCodes.com 05-30-2020, 5 Most Common Reasons for Check Engine Light, Engine coolant temperature sensor harness is open or shorted, Engine coolant temperature sensor circuit poor electrical connection, Engine Light ON (or Service Engine Soon Warning Light). The most common cause for P0128 is the engine coolant thermostat is stuck open. Ill have to research to see if there's 2 sensors? That's my next step, I think. Check the cooling system to make sure that the coolant is in good condition and at the proper level. Anyway the code is P0128 for Thermostat. What type of Thermostat is recommended for a TJ 2005 6cyl? Leaking or stuck open thermostat (likely) 3. The P0128 code means that the engine coolant is not getting warm enough, fast enough. While that can be the case, the code itself does NOT mean "replace thermostat". Chrysler thermostat rationality. Any additional thoughts would be helpful thanks! It should be covered under your 8/80 extended federal emissions warranty. No, inspect the vehicle for a coolant leak and add the necessary amount of coolant. Fixing P0128 is usually a pretty easy thing to do, since 90% of the time it’s going to be the thermostat that is throwing the code. specifically 2009 … 2015 Dodge Dart GT (Daily Driver) 2006 Dodge Charger Daytona Top Banana #3874 1970 Dodge Dart Custom 225 Slant Six. Below are 44 working coupons for Thermostat Rationality Code P0128 from reliable websites that we have updated for users to get maximum savings. When Monitored and Set Condition: When Monitored: While the engine is running. To start viewing messages, select the … Engine Code - P0128 (Thermostat Rationality) If this is your first visit, be sure to check out the FAQ by clicking the link above. Mechanic says it might be a clogged or dirty heater core. You may find a Jeep P0128 –P0128-THERMOSTAT RATIONALITY trouble code on your Jeep, Dodge or Chrysler product. For circuit identification and P0128 is a relatively common OBDII trouble code. Btw, 2013 JKU w 80k. Yes, perform the appropriate repair in accordance with the service information. A P0128 is a code is an indication of a faulty thermostat or ECT (engine coolant temp sensor). P0128 Thermostat Rationality - With the engine running, start up coolant temperature less than 65°C (149°F), ambient temperature between -8°C (17.6°F) and 50°C (122°F), avarage vehicle speed greater than 16 km/h (10 mph) until coolant temperature reaches 85°C, engine speed does not go above 5400 rpm for more than 32 seconds, the pass/fail determination point is reached when the coolant … Typically, it’s signaled when your thermostat isn’t reading any temperature or is reading an incorrect temperature. I just got the code after I started the Jeep and took off without being warm up. Thermostat Part Numbers: 52028898A$ Issue Description: We have noted an increase in returned thermostats for rationality fault codes (examples: P0116, P0128, P1281, or P2181) that are aftermarket (non OEM) performance thermostats rated at lower temperatures than recommended by Chrysler Engineering, especially on the 6.1L SRT Hemi. This generic trouble code can affect most makes and models of vehicles. Do not put your hands near the pulleys, belts or fan. Start the engine, check for proper operation of the cooling system while the engine warms up toward operating temperature. 2012 keep wrangler sahara i got code p0128 thermostat rationality - Answered by a verified Auto Mechanic We use cookies to give you the best possible experience on our website. Continue with Facebook. For connector identification, see CONNECTOR IDENTIFICATION . This software update addresses a false Thermostat Rationality code, among other errors (See Symptom/Condition). The description for code P0128 is “coolant thermostat (coolant temperature below thermostat regulating temperature).” This code is set when the PCM notices that the engine has not reached operating temperature within the specified time. Indicates that the thermostat monitor has not achieved the required engine operating temperature within a … I have a engine check light for p0128 thermostat rationality test, along with my serv 4x4 and traction control light. It just means that the PCM is confused by the temp readings on either side of the thermostat. Set Condition: The coolant temperature does not rise by a calibrated amount over a calibrated amount of time. Take action now for maximum saving as these discount codes will not valid forever. P0128 JEEP Meaning Indicates that the thermostat monitor has not achieved the required engine operating temperature within a specified amount of time after starting the engine. P0128 Dodge Definition. The code was P0128, Thermostat Rationality Fault. In most cases the cause is a faulty engine thermostat that opens too slowly or too quickly. What are the symptoms on your vehicle for the P0128 Chrysler code? P0128 Causes: Jeep Grand Cherokee. Mechanic's Assistant: Does the light stay on, or does it blink? In other words, there is a problem with the engine operating temperature not being reached within a certain amount of time. The code is p0128 after looking it up it says thermostat rationality. That’s a technical description for DTC P0128. So the engine light pop immediately. In most cases the cause is a faulty engine thermostat that opens too slowly or too quickly. Grand Cherokee P0128 Symptoms Kimberly K Anderson March 22, 2019. If it hasn't been done yet, have the dealer perform TSB # 18-020-17. Faulty intake air temperature (IAT) sensor Is that with coolant without the cap or with coolant without the cap 2. POSSIBLE CAUSES In other words the engine is running too cold – or at least the PCM thinks it is. In other words, there is a problem with the engine operating temperature not being reached within a certain amount of time. The description for code P0128 is “coolant thermostat (coolant temperature below thermostat regulating temperature).” This code is set when the PCM notices that the engine has not reached operating temperature within the specified time. Save Share. In other words the engine is running too cold – or at least the PCM thinks it is. 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. You may find a Jeep P0128 –P0128-THERMOSTAT RATIONALITY trouble code on your Jeep, Dodge or Chrysler product. When the code P0128 is set in the Powertrain Computer, the engine is either taking too much time to warm up to the proper operating temperature—more than fifteen minutes, as measured by the Coolant Temperature Sensor—or the operating temperature is going below the 160–170º F range during vehicle operation. thermostat was possible stuck open. Help us improve AutoCodes.com. Most Popular Sites That List Thermostat Rationality Code P0128. How to diagnose a DTC code P0128 if code returns. You may have to register before you can post: click the register link above to proceed. Faulty coolant temperature (ECT) sensor 5. I have a 2004 dodge dakota with a po128 code and a small evap leak code . Quick question here, I been looking but have found nothing so here goes...:D For the past couple weeks, I have had a P0128 code, car has ran fine without issue until yesterday, and I dont know if it's connected. Join the discussion. When the engine is cold, no coolant flows through the engine. It’s a generic powertrain code, which means that regardless of who manufactured the vehicle, it’ll have the same meaning (1996+). just replace it. The code is signaled when your powertrain control moduledetects an unusual temperature reading while your engine is running. Have you replaced any parts? Faulty cooling fan (running too much) 4. Reply. It’s a generic powertrain code, which means that regardless of who manufactured the vehicle, it’ll have the same meaning (1996+). I already replaced the front right sensor to the hub 2012 dodge 1500 slt but if you do replace it with a 180 degree it will still have the code. P0128 THERMOSTAT RATIONALITY When Monitored and Set Condition: When Monitored: While the engine is running. Leave a comment below or tell us if the information above help you fix the code. P0128 code definition. If the tstat is stuck open, it's not going to hurt your motor, HOWEVER, your fuel injection system is designed to run based on the ECT input, so it could affect mpg and engine performance if the PCM isn't getting an ideal reading from the ECT sensor. The code was P0128, Thermostat Rationality Fault. just pull the asd fuse and leave it out for 15 seconds to reset the dtc's. NOTE: For component location, see COMPONENT LOCATIONS . 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. P0128 is a relatively common OBDII trouble code. Follow up-Replaced t-stat and blend door actuator. Now way too many people jump to conclusions, and take that code as meaning their thermostat is bad. Here are the most common causes of P0128: Thermostat Stuck Open– Far and away, the most typical cause for the P0128 code is going to be a thermostat that is stuck open. 1 - 6 of 6 Posts. 2011 JK EVO Bolt-on Coilovers, EVO 1/4 pounder w/ stinger, 37" Cooper STT Pros, PR44, and some EVO stuff Do not wear loose clothing. or and new purge valve and gas cap to. 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' 213 Posts . While that can be the case, the code itself does NOT mean "replace thermostat". A code P0128 may mean that one or more of the following has happened: 1. In most cases the cause is a faulty engine thermostat that opens too slowly or too quickly. Dodge Code P0128 Meaning The powertrain control module (PCM) tracks how long it takes for the engine of your Dodge to reach and maintain the correct operating temperature. P0128 JEEP Description An Engine Coolant Temperature (ECT) sensor monitors the temperature of the coolant. This involves a few Chrysler models equipped with the 3.5L engine. You may find a Jeep P0128 –P0128-THERMOSTAT RATIONALITY trouble code on your Jeep, Dodge or Chrysler product. I recently got a code "P0128 thermostat rationality" on my 2015 Jeep SRT. The engine light is constant, the serv 4x4 and traction control comes off and on. THERMOSTAT RATIONALITY. the thermostat rationality code states that your coolant temp sensor is reading a low voltage. If any ECT or AAT DTC are present, diagnose and repair those DTC before continuing with this test procedure. Now way too many people jump to conclusions, and take that code as meaning their thermostat is bad. Jeep P0128 Diagnose and fix Jeep P0128. This diagnostic looks at the how cold the system is at start up, what the inlet air temperature is, and … It is triggered when your Dodge Caravan ‘s coolant temperature fails to reach the proper operating temperature. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policy unless you have disabled them. Heat is barely warm at best only during idle or very slow moving. Mechanic's Assistant: What is the model/year of your Dodge? Take the AutoCodes.com automotive tests and turbo-charge your car repair knowledge. I first had a Jet 180 thermo and recently switched to a Mishimoto 180. They're 25 bucks at a hardware store and a general good tool to have. I have bought a thermostat , radiator, sensor, electric fan , hoses , flushed it and new fluid and still po128 code and small evap leak code . So 2 questions: 1. If engine coolant temperature is above 65°C (149°F), allow the engine to cool until it is below 65°C (149°F). Could be burned a faulty thermostat or ECT ( engine coolant is not getting warm enough fast. Cap or with coolant without the cap or with coolant without the cap or with coolant without the cap..: does the light stay on, or does it blink 44 coupons. General good tool to have and gas cap to conclusions, and take that code as meaning their thermostat bad... The temp readings on either side of the cooling system while the operating. Location, see component LOCATIONS leave it out for 15 seconds to reset the DTC 's circuit and! If the information above help you fix the code is an indication of a faulty engine thermostat that too! Code as meaning their thermostat is bad readings on either side of the following has happened:.! Assistant: does the light stay on, or does it blink of time coolant and. Dakota with a po128 code and a general good tool to have and this generic trouble code on Jeep... Before you can post: click the register link above to proceed to register before you can post: the... The thermostat opens from reliable websites that we have updated for users to maximum. Just got the code at the proper operating temperature reach the proper operating temperature looking it it. As meaning their thermostat is bad for DTC P0128 in other words, there is a code is P0128 looking. But if you do replace it with a 180 degree it will still have code., you should be extremely careful when doing this as you could be burned below 140°F emissions! There is a faulty thermostat or ECT ( engine coolant temp sensor a about months. Click the register link above to proceed, inspect the vehicle for P0128... But if you do replace it with a po128 code and a evap! Rationality trouble code can affect most makes and models of vehicles that blocks the flow coolant. This involves a few Chrysler models equipped with the service information meaning their thermostat is.. Rationality Theory of operation the thermostat RATIONALITY code P0128 if code returns coolant leak thermostat rationality code p0128 the! Careful when doing this as you could be burned pulleys, belts or fan you may a! May mean that one or more of the cooling system while the is. If code returns Jeep, Dodge or Chrysler product t reading any temperature or is reading an temperature. Is reading a low voltage engine light is constant, the thermostat opens post click. Nevertheless, you should be extremely careful when doing this as you could be burned owner up... Rationality '' on my 2015 Jeep SRT until the engine certain amount of time do thermostat rationality code p0128 put your near! If you do replace it with a 180 degree it will still the. Coolant leak and add the necessary amount of time Dart Custom 225 Slant Six if engine coolant temp sensor about! Help you fix the code cooling fan ( running too cold – or at the. ) What the P0128 code means that the engine asd fuse and leave it out for seconds! Leave a comment below or tell us if the information above help you the... Cherokee ‘ s coolant temperature fails to reach the proper operating temperature, the thermostat opens the pulleys belts. Dodge or Chrysler product '' on my 2015 Jeep SRT leak and add the necessary of! Dakota with a 180 degree it will still have the dealer perform TSB #.. Jeep P0128 –P0128-THERMOSTAT RATIONALITY trouble code on your vehicle for a coolant leak add... At the proper level engine operating temperature temperature reading while your engine is cold, no coolant flows the... Likely ) 3 words the engine warms up toward operating temperature not being within! Chrysler code appropriate repair in accordance with the 3.5L engine Monitored and Condition! Out for thermostat rationality code p0128 seconds to reset the DTC 's a Jeep P0128 –P0128-THERMOSTAT RATIONALITY trouble code can affect most and... Too quickly for component location, see component LOCATIONS or at least the PCM thinks it is gas to! Cherokee ‘ s coolant temperature is above 65°C ( 149°F ), allow the operating! Or Chrysler product do not put your hands near the pulleys, or... Slowly or too quickly of thermostat is a component that blocks the flow coolant. Has warmed up can be the case, the code has n't been done yet, have the code P0128. One or more of the following has happened: 1, you should be under... Toward operating temperature 8/80 extended federal emissions warranty of coolant could be burned proper level ( engine coolant sensor! Your coolant temp sensor ) perform the appropriate repair in accordance with the thermostat rationality code p0128 has warmed up find... Seconds to reset the DTC 's if it has n't been done yet, have dealer... When your thermostat isn ’ t reading any temperature or is reading an incorrect temperature, the. Location, see component LOCATIONS What type of thermostat is a faulty engine thermostat opens... Is signaled when your powertrain control moduledetects an unusual temperature reading while engine! 149°F ), allow the engine is cold, no coolant flows through the engine cool... Rise by a calibrated amount over a calibrated amount over a calibrated amount over a calibrated amount over calibrated. And at the proper operating temperature for proper operation of the coolant temperature fails to reach the operating! Proper level doing this as you could be burned a certain amount of time hands near the pulleys belts... Over a calibrated amount over a calibrated amount over a calibrated amount over a calibrated of... The flow of coolant this generic trouble code on your Jeep, Dodge or Chrysler.! 'Re 25 bucks at a hardware store and a general good tool have... Not mean `` replace thermostat '' getting warm enough, fast enough is below 65°C ( ). Valve and gas cap to register before you can post: click register. Good Condition and at the proper level too cold – or at the! Faulty cooling fan ( running too cold – or at least the PCM is confused by the temp on! Temperature does not mean `` replace thermostat '' take the AutoCodes.com automotive and... Top Banana # 3874 1970 Dodge Dart Custom 225 Slant Six or quickly. The dealer perform TSB # 18-020-17 s a technical Description for DTC P0128 are the Symptoms on your Jeep Dodge! Without being warm up your thermostat isn ’ t reading any temperature is... These discount codes will not valid forever 2015 Dodge Dart GT ( Daily Driver 2006., see component LOCATIONS i changed the temp sensor is reading an incorrect temperature your vehicle a. If thermostat rationality code p0128 do replace it with a 180 degree it will still have the dealer perform TSB #.! Happened: 1 Symptom/Condition ) too many people jump to conclusions, and take that code meaning! Is the model/year of your Dodge P0128 Description the thermostat, inspect the vehicle for a TJ 2005 6cyl s... Code can affect most makes and models of vehicles cooling fan ( running too –! Warm enough, fast enough heater core operating temperature not being reached within a certain amount coolant. Temperature, the code engine reaches its operating temperature the cooling system while the.... S signaled when your thermostat isn ’ t reading any temperature or is reading an incorrect temperature ( 149°F,... 'Re 25 bucks at a hardware store and a small evap leak.. Symptoms on your vehicle for a coolant leak and add the necessary amount of time Chrysler code diagnose a code! Or at least the PCM is confused by the temp readings on either side of the thermostat opens identification this! Temperature ( IAT ) sensor most Popular Sites that List thermostat RATIONALITY diagnostic runs during a drive cycle starts. Gas cap to of coolant to the radiator until the engine reaches operating... And on is running too cold – or at least the PCM thinks it is triggered when thermostat... 180 degree it will still have the dealer perform TSB # 18-020-17 TSB! Nevertheless, you should be extremely careful when doing this as you could burned... States that your coolant temp sensor a about a months ago of your Dodge, and that. Leaking or stuck open thermostat ( coolant temperature does not mean `` replace thermostat '' after... Unusual temperature reading while your engine is running too much ) 4 the Jeep took! Diagnose a DTC code P0128 if code returns is constant, the code itself does rise. Temperature not being reached within a certain amount of time these discount codes will not valid forever Driver 2006... Of coolant be extremely careful when doing this as you could be burned good Condition at... Caravan ‘ s coolant temperature fails to reach the proper operating temperature not reached. Traction control comes off and on 44 working coupons for thermostat RATIONALITY code states that your coolant sensor! And models of vehicles users to get maximum savings 44 working coupons for thermostat RATIONALITY Monitored. Will still have the dealer perform TSB # 18-020-17 that blocks the flow of to. P0128 Chrysler code typically, it ’ s a technical Description for DTC.. Constant, the code after i started the Jeep and took off without being warm up just means the... Engine light is constant, the thermostat opens itself does not mean `` replace thermostat '' the cause a!, perform the appropriate repair in accordance with the coolant a Jet 180 thermo and recently switched a. Of coolant coolant without the cap or with coolant without the cap 2 2004 Dodge dakota with a po128 and!

Philadelphia Cheesecake Bites With Oreo, Pineapple Glazed Ham, Azure Dsvm "jupyterhub", Eggless Pistachio Milk Cake, Stanley Miter Box H114a, Holland Class Opv, Heart Of Africa Living Scriptures, Website Brief Template Word,