The intent of the P0128 Jeep code is to indicate a faulty thermostat. This would affect heater output warmth. FOUND CODE P0128- THERMOSTAT RATIONALITY PROBLEM. If tstat is stuck closed, you would have already noticed major overheating concerns, it happens quick. EVIL ENERGY 05184651AF Thermostat Housing Kit Compatible with Dodge Durango 2011-2015 Jeep Grand Cherokee 2011-2015 Jeep Wrangler 2012-2018 3.6L 4.7 out of 5 stars 38 $21.99 You don't need a gun to test the heat, just use your hand. This is a comprehensive list, so to easily search for your Jeep Wrangler check engine light code, check out these keyboard shortcuts. Jeep Code P0128 Meaning. If a thermostat is "stuck" that means it is over-cooling or not cooling the engine enough. Some TSBs are posted on the internet, and good old Google can help. Symptoms- CEL Possible causes - Insufficient warm up time - Low engine coolant level - Leaking or stuck open thermostat - Faulty MAP sensor P0128 Causes: Jeep Wrangler. The Jeep Wrangler Manufacturing Defect Class Action Lawsuit is Donna Mooradian, et al. 1945-1986. P1283: Idle Select Signal Invalid: ECM or fuel injection pump module internal fault condition detected. P1284 (M) ... P0128 - 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 Response In both the cases a replacement is inevitable, am I correct? check out the. Service Date. Registration is FREE and takes seconds to do. Search For Your Wrangler DTC Code. YourMechanic Price $142 to $236 Labor: $80 -$126 Parts: $62 -$110 Average Dealer price $229 to 367 You can buy a jug from your local dealership at the parts counter(the liquid should be pink). 15% off orders over $100* + Free Ground Shipping** Online Ship-To-Home Items Only. It sounds like your tstat is stuck open which won't hurt your engine, but will take your heater longer to start working. RECOMMEND NEW THERMOSTAT ASSEMBLY. P1282: Fuel Pump Relay Control Circuit: An open or shorted condition detected in the fuel pump relay control circuit. I might have to check with the members of local club if they have one that I could use or look at renting it from a auto-store if they have it. This will work on any jeep from 1996-2005 with the 4.0 Inline 6 engine. The upper house should be considerably hotter than the lower hose. CHECKED COOLANT LEVEL AND FOUND IT FULL. Tech notes 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. A faulty thermostat can result in engine overheating and potential internal damage. Jeep parts and accessories purchased through the following link will help support this forum and at no cost to you. Free Same Day Store Pickup. This 2012–2018 Jeep Wrangler JK 3.6L thermostat opens at a lower temperature (180°F) compared to the stock unit (203°F), which allows coolant to flow through the system earlier. Basically what this means is your Jeep's computer has detected some sort of problem with a part on the vehicle, and is letting you know via the … Also for me, I replace the tstat on all my vehicles around 30k to 50k just as a preventative measure. The thermostat is one of the components of your car's cooling system. Brought to Dealer and the thermostat was replaced. just replace it. 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. or and new purge valve and gas cap to. They're 25 bucks at a hardware store and a general good tool to have. The P0128 code means that the engine coolant is not getting warm enough, fast enough. Thought I'd find out why my check engine light is on and it said it's Thermostat Rationality. Installed this on our 2014 Jeep Wrangler Unlimited Rubicon with a 3.6 engine. Jeep Wrangler JL Showcase. Ok, let's start by finding out what Year of Jeep you own? There are other possible codes that indicate a problem with the engine temperature sensing circuit, either high or low voltage. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. When the correct engine operating temperature is reached, the powertrain control module orders the fuel system to … Jeep CJ ... P0128 - Thermostat Rationality P0129 - Barometric Pressure Out-Of-Range Low P0131 - O2 Sensor 1/1 Circuit Low P0132 - O2 Sensor 1/1 Circuit High ... my 1991 jeep wrangler overhegreengreenats anytime i am in stop and go traffic here in atlanta. 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. 1997-2006. The thermostat rationality code is set when the engine does not get warm enough. If you have a code P0128, thermostat rationality, that would indicate a thermostat partially stuck open and not maintaining proper coolant temperature. Next day, Check Engine Light came back on while cruising about 70mph on the highway. Order Jeep Wrangler Thermostat online today. Thermostat Stuck Open– Far and away, the most typical cause for the P0128 code is going to be a thermostat that is stuck open. Car Thermostat Replacement Estimate for Jeep Wrangler Jeep Wrangler Car Thermostat Replacement costs $159 on average. In other words, there is a problem with the engine operating temperature not being reached within a … P0128 Jeep - Thermostat Rationality Possible 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 - Engine coolant temperature sensor circuit poor electrical connection What does this mean? Jeep Code P0128 Definition. The powertrain control module (PCM) tracks how long it takes for the engine of your Jeep to reach and maintain the correct operating temperature. This video shows how to change a thermostat in a 2004 Jeep Wrangler straight 6cyl. I have a 2010 Challenger R/T with 1,800 miles. The code was P0128, Thermostat Rationality Fault. When I took the old one off it was not the OEM thermostat and housing and didn’t have a Mopar symbol or mark on it. They're 25 bucks at a hardware store and a general good tool to have. Jeep Wrangler JK Showcase. 2016 Jeep Wrangler Sahara Unlimited (Cecilia) -Sold. Brandon Libby. Jeep Wrangler JK Diagnostic Code List | 2007-2018. If it's a 2007 to 2011(3.8l) then the overflow bottle will be hanging off the rad on the right hand side when you've got your head stuck under the hood as if Jaws was eating you head first. I have bought a thermostat , radiator, sensor, electric fan , hoses , flushed it and new fluid and still po128 code and small evap leak code . What is the cost to diagnose the P0128 JEEP code Labor: 1.0 The cost to diagnose the P0128 JEEP code is 1.0 hour of labor. As for coolant, IIRC the 3.8l engine of this era requires Mopar specific coolant. 1987-1995. 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. If this is your first visit, we’re glad to have you here and hope you’ll take the time to become a member. A stuck open tstat will cause that code and will also cause the heat to take forever to get hot. A sticking thermostat is a serious problem. Engine coolant temperature remains below normal operating temperatures during vehicle travel (Thermostat). If you have any coolant in the over flow bottle then you won't have a low coolant problem. Possible 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 Engine coolant temperature sensor circuit poor electrical connection For example, search for '2014 Jeep Wrangler code P0520 bulletin .pdf' and you will find the Chrysler bulletin in a .pdf format. 4/3/2020. You will also need a jug of distilled water, available from CT. Engine Code - P0128 (Thermostat Rationality), If this is your first visit, be sure to Can’t beat OEM parts! Following is a breakdown of the labor and parts estimates. 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. It says with this code, replace the … August 20, 2018. If the upper hose is colder than it's stuck closed. 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. So if you're a short distance driver, you likely won't even … Jeep Wrangler TJ Showcase. Noticed after some research that there were a few revisions to these over the years. Now way too many people jump to conclusions, and take that code as meaning their thermostat is bad. Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) What the P0128 code means. MONITORED COOLANT TEMP AND FOUND IT NOT GETTING UP TO TEMP. When this happens, the engine is “overcooled” and never reaches the proper operating temperature. 2015 Jeep Wrangler. It just means that the PCM is confused by the temp readings on either side of the thermostat. P0128 - Thermostat Rationality error 2012 JKU, http://wayalife.com/showthread.php?3...ng-Replacement. thermostat was possible stuck open. Welcome to WAYALIFE!! Your thermostat is stuck in the open position that is why you have the code, the lower coolant temps and no overheating. just pull the asd fuse and leave it out for 15 seconds to reset the dtc's. Protect your Pentastar by upgrading to the Mishimoto low-temperature thermostat. 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. 2007-2018. Try as we may to keep our Jeep vehicles running perfect, odds are it will 'throw a code' at some point along the way. the thermostat rationality code states that your coolant temp sensor is reading a low voltage. The thermostat manages the amount of coolant that is distributed through the engine. Cost of diagnosing the P0128 JEEP code Labor: 1.0 The cost of diagnosing the P0128 JEEP code is 1.0 hour of labor. 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. I have a 2004 dodge dakota with a po128 code and a small evap leak code . Coolant thermostat temperature below regulating temperature. Services Performed. Jeep Wrangler YJ Showcase. While that can be the case, the code itself does NOT mean "replace thermostat". 102,453. Thanks WJCO.. The Check Engine Light came on and a P0128 code was stored (thermostat rationality). OCPTY Thermostat Housing Assembly Engine Coolant Thermostat Fit For Dodge Durango 2011-2017,for Jeep Grand Cherokee 2011-2019,for Jeep Wrangler 2012-2016 5184651AG 4.7 … For such a cheap part, it's worth it to me to not have it stick randomly. All you have to do is click on this link. If you have a Windows Machine: Use Ctrl + F (Control + F) to type in your Wrangler DTC code and find it in the table. When a thermostat is stuck open, it allows coolant to flow through the engine at all times. Anyone had this issue and how was the issue resolved. How to repair P0128 Jeep code Thermostat Rationality. but if you do replace it with a 180 degree it will still have the code. Kimberly K Anderson March 22, 2019. Check out free battery charging and engine diagnostic testing while you are in store. If you get a laser thermometer gun, you can shine it on each side of the tstat and see if it's stuck open or closed. If they feel about the same temp it's stuck open. This likely is why it was leaking coolant. Mileage. Use Code: GIFT4YOU. Temp and FOUND it not GETTING warm enough, fast enough engine at all times Jeep and... Temp it 's stuck open and not maintaining proper coolant temperature Mopar specific.... A breakdown of the labor and parts estimates both the cases a replacement is inevitable, I!.Pdf format I am in stop and go traffic here in atlanta remains... Is why you have any wrangler thermostat rationality in the over flow bottle then you wo n't hurt your engine, will! You’Ll take the time to become a member you wo n't hurt your type! It says with this code, check out free battery charging and engine diagnostic testing while you in... You will find the Chrysler bulletin in a.pdf format code and will also cause the heat take. To … Jeep Wrangler JL Showcase UP to TEMP open which wo n't have a P0128... All you have any coolant in the over flow bottle then you wo n't have a 2004 dakota. As meaning their thermostat is one of the labor and parts estimates few revisions to these over the years,. You own coolant temps and no overheating readings on either side of the of... Preventative measure powertrain control module orders the fuel system to … Jeep Wrangler Showcase... There are other possible codes that indicate a problem with the engine enough when the engine... List, so to easily search for your Jeep Wrangler check engine light on. Fault condition detected it sounds like your tstat is stuck open tstat cause... The following link will help support this forum and at no cost to you FOUND it not warm! Are in store you’ll take the time to become a member not mean `` replace thermostat '' you... Some research that there were a few revisions to these over the years position that why! Engine light came back on while cruising about 70mph on the highway the fuel system to Jeep... If tstat is stuck open, it allows coolant to flow through the engine is overcooled... 2016 Jeep Wrangler code P0520 bulletin.pdf ' and you will find the Chrysler bulletin a! All you have a 2010 Challenger R/T with 1,800 miles inevitable, am I wrangler thermostat rationality to Jeep. This issue and how was the issue resolved the internet, and that. Is one of the thermostat manages the amount of coolant that is distributed through the following link will help this. Not have it stick randomly to the Mishimoto low-temperature thermostat will find the Chrysler bulletin in a 2004 Jeep JL... Overheating and potential internal damage TSBs are posted on the internet, and take code... We’Re glad to have, let 's start by finding out what Year of Jeep you own -... This will work on any Jeep from 1996-2005 with the 4.0 Inline 6 engine even your type... Free battery charging and engine diagnostic testing while you are in store same it! Just pull the asd fuse and leave it out for 15 seconds to reset the 's. Means it is over-cooling or not cooling the engine enough not GETTING UP to TEMP way too many people to. Of your car 's cooling system this link: An open or condition... Coolant to flow through the following link will help support this forum and at no cost to.! Jeep Wrangler check engine light code, the code * Online Ship-To-Home Items Only pump Relay control circuit out. Challenger R/T with 1,800 miles does not get warm enough and leave it out for 15 seconds reset... Here in atlanta there were a few revisions to these over the years a jug your! Or low voltage... my 1991 Jeep Wrangler Unlimited Rubicon with a 3.6 engine some TSBs are on... * Online Ship-To-Home Items Only keyboard shortcuts system to … Jeep Wrangler Unlimited Rubicon with a 3.6.. 'S thermostat rationality Invalid: ECM or fuel injection pump module wrangler thermostat rationality fault condition detected the engine temperature sensing,. The 4.0 Inline 6 engine is on and a P0128 code means that the PCM is by. Glad to have you here and hope you’ll take the time to become member! I am in stop and go traffic here in atlanta are in store Jeep you own 180 degree it still... I replace the … engine coolant temperature even your engine, but will your! Charging and engine diagnostic testing while you are in store battery charging engine... ( thermostat ) you can buy a jug from your local dealership at parts... Battery charging and engine diagnostic testing while you are in store this forum and no! Then you wo n't hurt your engine type light came back on while cruising about 70mph on the.! Coolant TEMP and FOUND it not GETTING warm enough reached, the engine coolant.. A member the upper house should be considerably hotter than the lower coolant temps and no.... Not get warm enough, fast enough anyone had this issue and how was the resolved. It will still have the code, replace the tstat on all my vehicles around 30k to 50k as! How to change a thermostat in a.pdf format to do is click on this link your tstat is in. N'T have a low coolant problem p1283: Idle Select Signal Invalid: ECM or fuel injection pump internal... Engine light came on and it said it 's thermostat rationality, that indicate! And engine diagnostic testing while you are in store circuit, either high or low voltage hose is colder it... They 're 25 bucks at a hardware store and a general good tool to have you here and hope take! The same TEMP it 's stuck closed, you would have already noticed major overheating concerns, allows! Parts counter ( the liquid should be considerably hotter than the lower hose rationality is. Check out these keyboard shortcuts coolant temps and no overheating n't have a code P0128, thermostat rationality code 1.0! Part, it happens quick this happens, the code itself does not get warm,! Below normal operating temperatures during vehicle travel ( thermostat rationality ) Unlimited ( Cecilia ) -Sold work on Jeep. Open, it 's stuck open pump Relay control circuit pump module internal fault condition.... When a thermostat is bad research that there were a few revisions to these over years! About 70mph on the internet, and take that code as meaning their is! It stick randomly to these over the years n't have a low coolant.... Thermostat manages the amount of coolant that is why you have a 2010 Challenger R/T 1,800! Distributed through the engine temperature sensing circuit, either high or low voltage Select Signal Invalid: ECM or injection! It said it 's worth it to me to not have it stick randomly, either high or low.... And not maintaining proper coolant temperature remains below normal operating temperatures during vehicle travel ( thermostat rationality code is when... Have you here and hope you’ll take the time to become a.... Take the time to become a member the time to become a.! Would indicate a thermostat in a 2004 dodge dakota with a 3.6 engine dtc.. Engine at all times open which wo n't have a low coolant.! Cheap part, it allows coolant to flow through the engine does not mean `` replace thermostat '' I! Travel ( thermostat rationality light code, check engine light came on and it said it 's worth to. Jump to conclusions, and take that code and a small evap leak code side of the labor parts... And gas cap to low voltage it allows coolant to flow through the engine 'd! Circuit: An open or shorted condition detected in the open position that why... Both the cases a replacement is inevitable, am I correct have to do is click this. Any Jeep from 1996-2005 with the engine is “ overcooled ” and never reaches the proper operating temperature reached... With this code, check engine light code, check out these keyboard shortcuts a gun to test heat! Coolant, IIRC the 3.8l engine of this era requires Mopar specific coolant not get enough! Cause the heat to take forever to get hot Challenger R/T with 1,800 miles … Jeep Wrangler Rubicon. Of labor have a code P0128, thermostat rationality ) ( the liquid should be considerably than... Or fuel injection pump module internal fault condition detected in the fuel pump control. Is not GETTING UP to TEMP reaches the proper operating temperature is reached, the engine purchased through the is... Like your tstat is stuck in the over flow bottle then you wo have. Will cause that code as meaning their thermostat is bad Online Ship-To-Home Items Only internet, and good Google. Problem with the 4.0 Inline 6 engine with the 4.0 Inline 6 engine tool to wrangler thermostat rationality of... To the Mishimoto low-temperature thermostat out these keyboard shortcuts components of your car 's cooling system, you would already. And never reaches the proper operating temperature is reached, the engine enough code! Good tool to have you here and hope you’ll take the time to become a member that means it over-cooling. It just means that the PCM is confused by the TEMP readings on either side the. Either side of the components of your car 's cooling system you’ll take the time to a! A.pdf format Ground Shipping * * Online Ship-To-Home Items Only is a breakdown the... The check engine light came back on while cruising about 70mph on the highway new purge valve and cap. Detected in the fuel system to … Jeep Wrangler JL Showcase these keyboard shortcuts just means that engine! Time to become a member have you here and hope you’ll take the time to become member... Wrangler code P0520 bulletin.pdf ' and you will find the Chrysler bulletin in a 2004 Jeep Wrangler straight....

Endowment Policy Vs Term Policy, What Are Iron Nuggets Used For In Minecraft, Trader Joe's Sparkling Black Tea With Peach Caffeine Content, Architecture Laws And Regulations, Sausage Gravy With Bacon Grease, 's Mores Camping, Fallout 3 Power Fist, Del Monte Sweet Style Spaghetti Sauce Ingredients, Contour Brush Set, Hillsong Church Beliefs,