They're 25 bucks at a hardware store and a general good tool to have. Reference. P0128is a relatively common OBDII trouble code. Jeep JK Computer Diagnostic Codes B1001 ‐ A/C SWITCH REQUEST INPUT CIRCUIT LOW (ATC & MTC) ... P0128 ‐ THERMOSTAT RATIONALITY P0129 ‐ BAROMETRIC PRESSURE OUT‐OF‐RANGE LOW ... A forum community dedicated to Jeep Wrangler JK owners and enthusiasts. If you have a Windows Machine: Use Ctrl + F (Control + F) to type in your Wrangler DTC code and find it in the table. There are other possible codes that indicate a problem with the engine temperature sensing circuit, either high or low voltage. Engine Code - P0128 (Thermostat Rationality) Thought I'd find out why my check engine light is on and it said it's Thermostat Rationality. By continuing to use this site you consent to the use of cookies on your device as described in our cookie policyunless you have disabled them. A code P0128 Jeep may mean that one or more of the following has happened: Low engine coolant level Leaking or stuck open thermostat Faulty cooling fan (running too much) Faulty coolant temperature (ECT) sensor Faulty intake air temperature (IAT) sensor My check engine light just came on, but the Jeep still runs good. It should be noted that most modern fuel injected engines to like to run at 200+ degrees. P0128 is a relatively common OBDII trouble code. The plaintiffs claim they leased a new 2013 Jeep Wrangler in 2013. Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) What the P0128 code means. Cloudflare Ray ID: 6095adf7aa37e00b I have a 2004 dodge dakota with a po128 code and a small evap leak code . By maintaining your vehicle, you're able to enjoy its durability and reliability for years to come. My heat is not blowing hot, just like-warm. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. It can be really difficult to tell this in a vehicle that doesn’t have a temperature gauge. 2013JKU error code and message P0128 "Thermostat Rationality". Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. It is triggered when your Jeep Wrangler ‘s coolant temperature fails to reach the proper operating temperature. Brandon Libby. 2018 (JL) Jeep Wrangler NOTE: This bulletin applies to vehicles within the following markets/countries: North America, APAC, EMEA and LATAM. Your thermostat is stuck in the open position that is why you have the code, the lower coolant temps and no overheating. The P0128 code means that the engine coolant is not getting warm enough, fast enough. If you pinch your hose make sure that you are aware of the belted accessories and the fan. P0128 code definition. P0128 is not a serious threat to the immediate drivability of your Wrangler. Most auto repairs shops charge between $75 and $150 per hour. Further, Chrysler refuses to cover the costs of labor and repair for the manufacturing defect during the warranty period, claiming instead that the problem was caused by owner misuse or external factors, the Jeep Wrangler class action lawsuit alleges. 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 Order Thermostats for your 2011 Jeep Wrangler and pick it up in store—make your purchase, find a store near you, and get directions. P0128 Thermostat rationality The likely cause is the thermostat, that or you have low coolant level, You can even set this code if you use just plain water. Your order may be eligible for Ship to Home, and shipping is free on all online orders of $35.00+. I did a DTC code check with my Superchips and got a DTC code of P0128-Thermostat Rationality....which leads me to thing that the thermostat is stuck open. Insert key and turn the ignition On-Off-On-Off then back to the On position and then notice the codes given in the odometer read-out.B1402 - FRONT LEFT AUDIO SPEAKER OUTPUT CIRCUIT HIGHB1403 - FRONT LEFT A Letting them run too cool can problems after an extended period of time. Your Jeep Wrangler simply cannot be stopped. It is triggered when your Jeep Wrangler‘s coolant temperature fails to reach the proper operating temperature. The fan can come on at any time, 8L90E Specs, Performance, and Identification, TH400 Transmission Specs, ID, and Common Problems, Jeep Renegade P0128: Coolant Thermostat – Below Temp, Jeep Liberty P0128: Coolant Thermostat – Below Temp, Chevy Impala: Brake Lights Stuck On → Diagnosis. There aren’t many symptoms with P0128, unless it gets cold. asked Aug 20, 2017 by Keith Thank You for answering me! The fan can come on at any time. Service Date. ... P0111 - Intake Air Temperature Sensor Rationality P0112 - Intake Air Temperature Sensor Circuit Low ... P0128 - Thermostat Rationality P0129 - Barometric Pressure Out-Of-Range Low P0131 - … When this part isn't working properly, it can cause incorrect temperature gauge readings, and can also lead to the engine overheating. If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. It’s a generic powertrain code, which means that regardless of who manufactured the vehicle, it’ll have the same meaning (1996+). If you feel little to no heat from the heater, then it’s a pretty good indication that the thermostat is the problem, and not a wiring issue. Another way to prevent getting this page in the future is to use Privacy Pass. or and new purge valve and gas cap to. August 20, 2018. Thermostat Part Numbers: 52028898A$ 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. If you pinch your hose make sure that you are aware of the belted accessories and the fan. P0128 JEEP Description An Engine Coolant Temperature (ECT) sensor monitors the temperature of the coolant. Most auto repairs shops charge between $75 and $150 per hour. 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. Even when I was overheating, the gage never went past 1/2. Jeep Wrangler JK Diagnostic Codes for 2007 to 2018. Also, a mechanic will typically check under the hood where the radiator hose meets the thermostat housing. If your ride starts to overheat, immediately replace the Jeep Wrangler thermostat with a durable part from AutoZone. Do I need to take the Jeep in to have a code determined or is there a way to get a code to come up. Symptoms- CEL Possible causes - Insufficient warm up time - Low engine coolant level - Leaking or stuck open thermostat - Faulty MAP sensor MONITORED COOLANT TEMP AND FOUND IT NOT GETTING UP TO TEMP. There are NO other codes - P0128-THERMOSTAT RATIONALITY - coolant level in radiator not tank, thermostat issue, AAT issue Many codes will effect other systems - … Please enable Cookies and reload the page. Renegade P0128 Symptoms FOUND CODE P0128- THERMOSTAT RATIONALITY PROBLEM. Trouble code PO128. Cost of diagnosing the P0128 JEEP code Labor: 1.0 The cost of diagnosing the P0128 JEEP code is 1.0 hour of labor. August 27, 2015 ; ... P0128 - Thermostat Rationality P0129 - Barometric Pressure Out-Of-Range Low P0131 - O2 Sensor 1/1 Circuit Low P0132 - O2 Sensor 1/1 Circuit High How to repair P0128 Jeep code Thermostat Rationality. Here are the symptoms associated with this trouble code: 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. In other words, there is a problem with the engine operating temperature not being reached within a certain amount of time. You may need to download version 2.0 now from the Chrome Web Store. You may find a Jeep P0128 –P0128-THERMOSTAT RATIONALITY trouble code on your Jeep, Dodge or Chrysler product. Your IP: 83.169.20.76 2018 Jeep Wrangler « Back to Wrangler TSBs ... P0128 - Thermostat Rationality(Sales Codes NA1 with NBQ or NB6 Only - APAC and EMEA Only). 102,453. Check here for special coupons and promotions. I have 2012 jeep JK wrangler sport. Search For Your Wrangler DTC Code. 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. What is the cost to diagnose the P0128 CHRYSLER code Labor: 1.0 The cost to diagnose the P0128 CHRYSLER code is 1.0 hour of labor. Coolant temperature is between 179- 186 degrees. Engine light came on 1 day ago. ... A forum community dedicated to Jeep Wrangler JK owners and enthusiasts. Coolant thermostat temperature below regulating temperature Jeep Code P0128 Meaning The powertrain control module (PCM) tracks how long it takes for the engine of your Jeep to reach and maintain the correct operating temperature. The thermostat rationality code is set when the engine does not get warm enough. Jeep Wrangler P0128: Coolant Thermostat – Below Temp November 5, 2018 by Jason P0128 is a relatively common OBDII trouble code. You purchased it for its rugged utility. • If you have a code P0128, thermostat rationality, that would indicate a thermostat partially stuck open and not maintaining proper coolant temperature. Good luck figuring out what is going on with your Wrangler! 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. The Jeep is an '03 Rubicon with just over 24,500 miles. Kimberly K Anderson March 22, 2019. ... • P0128 ­ Thermostat Rationality (Sales Codes NA1 with NBQ or NB6 Only ­ APAC and EMEA Only). Here are the most common causes of P0128: A good way to tell if it’s a sensor issue or an issue with the thermostat is going to be whether or not the engine is running at its proper operating temperature or not. It’s a generic powertrain code, which means that regardless of who manufactured the vehicle, it’ll have the same meaning (1996+). Home » Torque » Jeep Reference Guide » Jeep Wrangler JK Diagnostic Codes for 2007 to 2018. This would affect heater output warmth. Any connection or thoughts? Services Performed. If it is easy to pinch the hose, typically water will be flowing through it. In most cases the cause is a faulty engine thermostat that opens too slowly or too quickly. RECOMMEND NEW THERMOSTAT ASSEMBLY. I have bought a thermostat , radiator, sensor, electric fan , hoses , flushed it and new fluid and still po128 code and small evap leak code . Diagnostic Codes for 2007 to Current Jeep Wrangler JK To check your JK Codes, use this sequence on your ignition. CHECKED COOLANT LEVEL AND FOUND IT FULL. If you are at an office or shared network, you can ask the network administrator to run a scan across the network looking for misconfigured or infected devices. This is a comprehensive list, so to easily search for your Jeep Wrangler check engine light code, check out these keyboard shortcuts. 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. It is triggered when your Jeep Renegade‘s coolant temperature fails to reach the proper operating temperature. Mileage. 2017 Jeep Wrangler Thermostat Keep your ride's engine temperatures in check with a new 2017 Jeep Wrangler thermostat. The auto repair labor rates vary widely across the country, and even within the same city. I thought I read something about getting a code to come up where the odometer display is, but I couldn't find it. Performance & security by Cloudflare, Please complete the security check to access. A good way to at least get a good idea as to whether or not it’s the thermostat or the sensor is to start the car cold and let it idle for ten or so minutes. 4/3/2020. 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