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.#1 · May 29, 2018. Hey Everyone, I have a 2013 Jeep Wrangler Unlimited Rubicon (just passed 60k miles) with a recurring error code P0128 that's driving me nuts. I have an …Code breakers are people who use logic and intuition in order to uncover secret information. Learn more about code breakers and how code breakers work. Advertisement Information is...Of course, they can't get it looked at in a timely fashion, so I'll do it myself. On the 2013 Wrangler JK, I have had the P0128 light on since having the water pump squeal replacement. Last week I replaced the thermostat (and housing-one piece) to the tune of ~$75, including a gallon of the $26 dollar OAT antifreeze. Light decided to come back on.Ratchet said: P0128 sets when it takes longer than normal for the engine to reach operating temperature. Generally caused by a thermostat that is partially stuck open and/or low engine coolant. If there is a problem with the coolant temperature sensor, there are several trouble codes that can set for that as well.Dec 14, 2019 · What is P0128 Jeep JK Diagnostic Code? This is a DIY video for Jeep JK Thermostat Replacement...Parts:1) Mopar Thermostat w/housing - https://www.amazon.com... 2011 3.8L jeep jk. received P0128 code, replaced thermostat and ECT.. Hooked up a scanner and drove on highway 65mph, coolant temp readings fluctuate between 168 - 175. When stopped or at slower speeds temperature will rise but will suddenly decrease when speed picks up. Stopped and idled noticed fan kicked in and the scanner was only …Apr 12, 2021 · 21. Location. Louisiana. Jan 6, 2023. #1. I need a reliable and quick response to my concern. My check engine light is on and I checked for the code. It shows me the P0128 code related to the coolant system running low temperature. I read somewhere that the risk is low, but should get it checked out within a month. Nov 10, 2021 · 3299 posts · Joined 2015. #4 · Nov 10, 2021. Thermostat stuck open. The first time mine did it, I just erased the DTM. P0128 is a permanent code, and will stay in the system until it completes so many cycles without detecting the low coolant temp. That said, after mine set the code again, I replaced the thermostat. hasn't been back on since. Jeep Code P0128 means that your Engine Coolant Temperature is below the thermostat regulating temperature. Simply put, the coolant which helps regulate your engine’s temperature is colder …21. Location. Louisiana. Jan 6, 2023. #1. I need a reliable and quick response to my concern. My check engine light is on and I checked for the code. It shows me the P0128 code related to the coolant system running low temperature. I read somewhere that the risk is low, but should get it checked out within a month.A P0128 code in a Jeep is caused by an engine coolant temperature (ECT) sensor that is not reaching the predetermined temperature within a certain amount of time. You’ll also notice this in other vehicles besides Jeeps, such as the P0128 code in a Honda Civic. The ECT sensor monitors the engine’s operating temperature and sends a signal …7 posts · Joined 2021. #1 · Mar 1, 2021. When driving on the road, my CEL came on, managed to scan it and my scanner came up with the P1239 code. Haven't heard that one before I so I looked it up and apparently it calls for my engine oil temp being too low. Has anyone else had this code in the past, if so, what did you do to correct it?Fault Code P0128 advice. ... 12 JK, 3.5" Teraflex/Franken lift, Bilstein 5100's, BFG KM3's 37x12.5/R17 ... Last time out, I let the Jeep sit for 5 minutes idling, saw the temp rise up to 225ish and then saw the radiator fan kick on and the temp dropped back down. So I don't think the thermostat was the issue, unless I just need to pull the ...What Does Code P0128 Mean? Code P0128 stands for Engine Coolant Temperature Below Thermostat Regulating Temperature. It means that the ECM/PCM has “noticed” that the engine coolant temperature is consistently running below thermostat regulating temperature. In other words, the engine is running cooler than it should.Oct 25, 2023 · The P0128 code is a diagnostic trouble code (DTC) that indicates a possible issue with the thermostat in your Jeep Wrangler’s engine. It is related to the engine coolant temperature being below the expected operating range. Code c1252/traction control light intermittently on. I’ve got a 2016 rubicon hard rock and my traction control light is randomly coming on. Usually once every other week, comes on upon startup. Won’t go off on it’s own, but if I turn off vehicle and turn it back on it will be gone. Got a code reader, was surprised to find it wasn’t a ...Nov 10, 2021 · 3299 posts · Joined 2015. #4 · Nov 10, 2021. Thermostat stuck open. The first time mine did it, I just erased the DTM. P0128 is a permanent code, and will stay in the system until it completes so many cycles without detecting the low coolant temp. That said, after mine set the code again, I replaced the thermostat. hasn't been back on since. Its a 10mm and about 2 minutes of time to unhook a battery cable, thermo was stuck wide open as they are designed to fail that way and not closed. Heater will cook a steak with a new one installed. Reset it and forget about it, ive done a few of these over the years, always a p0128 especially if you let it idle before you drive it.=====Claim your FREE engine code eraser 👉 https://free.nonda.co 👈=====Engine Code JEEP P0522 Saving Repair ...Aug 22, 2018 · I just recently re-entered the Jeep world with a 2012 JKU sport auto. About two weeks ago while driving my jeep threw three codes. P0128 (coolant temp low), P0306 (misfire on cylinder 6) and random misfire. No real drivability problems other than a slight bog when the jeep shifted into third gear. Jeep Code P0128 means that your Engine Coolant Temperature is below the thermostat regulating temperature. Simply put, the coolant which helps regulate your engine’s temperature is colder than it …Jeep Error Code P0128 refers to a diagnostic trouble code that indicates a potential issue with the cooling system. When this code appears, it means that the engine coolant temperature does not reach the expected operating temperature within a specified time frame.Jan 24, 2024 · Jeep Error Code P0128 refers to a diagnostic trouble code that indicates a potential issue with the cooling system. When this code appears, it means that the engine coolant temperature does not reach the expected operating temperature within a specified time frame. The P0128 code is a diagnostic trouble code (DTC) that indicates a possible issue with the thermostat in your Jeep Wrangler’s engine. It is related to the engine coolant temperature being below the expected operating range.If the coolant in the radiator is properly topped off and there's no issue with the radiator cap and the coolant (HOAT for a 2008) is still within 5 yrs./100K miles, this could be the issue: Update - Dealer called - TSB for P2181 code. NUMBER: 18-015-10 REV. GROUP: Vehicle Performance. DATE: August 12, 2010.If you are a car owner, you may have encountered the dreaded check engine light at some point. One of the common trouble codes that can trigger this warning is the P0128 code. This...May 29, 2018 · I need to get my inspection done but my CEL was on with p0128 code. I replaced the thermostat, drove a couple days and the CEL went off. Continued to drive for a few more days. I still cannot get inspected (NY) because the vehicle is showing a P0128 as a "stored" code (using Foxwell NT201 OBD reader), even though the CEL is off. It could take up to 100 miles, with multiple restarts included. Clear the codes with your Jscan, check for others and drive more.. This is not exclusively a Jeep situation had same on a Chev Equinox previously. Good Luck. Vaya Con Dios..1 JKU & 1 JT Mojave. JKU is mbr of Real Men Use 3 Pedals" Club.. 2013 JKU and 2021 Mojave..Best Solutions for the P0128 Code. You can try several solutions to fix the P0128 code in your Jeep. Replace the Thermostat. It must be replaced if a faulty thermostat is causing the P0128 code. A new thermostat will regulate the flow of coolant and help maintain the proper engine temperature. Check and Refill Engine CoolantDec 20, 2014 · This code sets when the ECM sees that the engine takes to long to warm up. This usually happens because the thermostat is either stuck open or opening sooner than it should. It is a pretty global cause and correction for P0128 across many makes and models of vehicles. Replacing the T-stat should take care of this and you should not have any ... On May 18, JK Lakshmi Cement will report Q4 earnings.Analysts predict JK Lakshmi Cement will report earnings per share of INR 7.57.Go here to watc... JK Lakshmi Cement is reporting...It's About Time. 333 subscribers. 32. 4.2K views 2 years ago. Solving the issue we have that is causing the check engine light to illuminate. P0128 error code can …#1 · May 29, 2018. Hey Everyone, I have a 2013 Jeep Wrangler Unlimited Rubicon (just passed 60k miles) with a recurring error code P0128 that's driving me nuts. I have an …** Click "Show More" to Learn more about this video **=====Check out our NEW Website for 2023!!https://www.milehighcampers...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 Jeep Code - Thermostat Rationality. How to Fix. Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors.P0108 is a generic OBD-II trouble code. It indicates your Jeep Wrangler's MAP (manifold absolute pressure) sensor's voltage reading is outside of the normal operating range. The voltage is too high. It's most commonly caused by a bad MAP sensor, wiring issue, or vacuum leak. The MAP sensor measures the air pressure coming intoDo-It-Yourself instructions for replacing a thermostat housing in a 2012 Jeep Wrangler JK with a 3.6L V6 Pentastar engine. Fix the P0128 trouble code.My engine light came on with a P0128 (temp not reaching running temp within 15 mins). The temp gauge started climbing and bouncing between 3/4 and half. The temp on the dash was reaching 235 and 240 which is very hot for this car. Question: The code usually means a bad coolant sensor or a bad thermostat. But these usually fail OPEN …P0128 - Thermostat Repalcement Question. 2013 JK. Recently started getting cold here in Texas. Had the Check Engine light come on with this stupid code. Reset, warmed up and code did not come back. Got cold again and it come on again, sot its on all the time. Did the research to the Thermostat and/ or the Temp Sensor on the side …21. Location. Louisiana. Jan 6, 2023. #1. I need a reliable and quick response to my concern. My check engine light is on and I checked for the code. It shows me the P0128 code related to the coolant system running low temperature. I read somewhere that the risk is low, but should get it checked out within a month.I just recently re-entered the Jeep world with a 2012 JKU sport auto. About two weeks ago while driving my jeep threw three codes. P0128 (coolant temp low), P0306 (misfire on cylinder 6) and random misfire. No real drivability problems other than a slight bog when the jeep shifted into third gear.1004. ECU Battery Feed & Power Grounds. 1005. System Ground Circuit. 1006. EGR/EVAP Solenoid Circuit Low. 1007. EGR/EVAP Solenoid Circuit High. 1008.SpottyJ. 212 posts · Joined 2013. #2 · Feb 4, 2020. I have a 2013 Wrangler JK, last week, at 87K, it threw Code P0305. Started running rough at idle. Bought it dealer, after they tore it apart, they confirmed a bad head. They said new head is on back-order and could take months.P0404 - Egr Position Sensor Rationality Open. P0405 - Egr Position Sensor Circuit Low. P0406 - Egr Position Sensor Circuit High. P0420 - Catalyst Efficiency (bank 1) P0430 - Catalyst Efficiency (bank 2) P0440 - General Evap System Failure. P0441 - Evap Purge System Performance.Jan 31, 2021 · 2016 JK Rubicon Hard Rock Auto Trans 2008 Jeep Liberty Auto Trans 1988 E-150 4.9L 5 Speed Stick ... That P0128 code is "thermostat rationality" or some such. To me ... Dec 15, 2011 · 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. Symptoms- CEL. Possible causes. - Insufficient warm up time. - Low engine coolant level. - Leaking or stuck open thermostat. Tools Used:Milwaukee 2767-20 M18 Fuel High Torque 1/2-Inch Impact Wrench https://amzn.to/INNOVA 3612 Milwaukee Electric Tools 2557-20 M12 Fuel 3/8" RATCHETht...P0128 Code (2017 Jeep JK) I got a code this morning on my way to work and after scanning saw that it was p0128. After researching a bit it looks like my coolant isn’t getting hot enough due to the tstat being stuck open.