2012 jeep wrangler thermostat temperature The normal running temperature of the engine will change very little, or not at all with a 180 thermostat. I slowed down to 55mph and the temp came back down to normal. Now, efficient cooling for your JK is absolutely necessary, especially if you take your Jeep off-road or live in a warmer climate, where engine heat soak can be an issue. While there's a fluid temperature sensor on the oil cooler housing, it measures oil temperature, not coolant temperature. Jan 27, 2023 · The P0128 code indicates that the engine coolant temperature is below the thermostat regulating temperature. Now, common failure with the JK is the thermostat getting stuck shut, which is a big Dec 18, 2019 · This could be due to several factors, including a malfunctioning thermostat, a faulty coolant temperature sensor, or low coolant levels. I also saw there are some cheap aluminum replacements but they are so cheap I am guessing you get what you pay for. 6L V6. Went to the dealership and bought a new thermostat and coolant temp sensor. 6L engine? The 3. Jeep engineers designed the cooling system and used that thermostat for a reason, I just honestly don't think it's wise to go changing it. Some users recommend draining the radiator to minimize mess, while others emphasize the importance of bleeding air from the new thermostat after installation. The thermostat stays in the closed Jun 21, 2016 · For a 2015 Jeep Wrangler JK, a normal operating temperature is between 206 and 226 degrees Fahrenheit. It is also mentioned that a tuner, like a Diablo Top 5 Problems Jeep Wrangler JK SUV 3rd Generation 2007-2018 NEVER Use These 9 Fuel Injector Cleaners (& 5 That WORK!) 2012-2017 JEEP WRANGLER 3. 7L HEMI and 182,000 miles. Stoped at Chrysler dealer, told thermostats are National bad order of over 55,000 (!). The OEM rating is 203°F. com FREE DELIVERY possible on eligible purchases Aug 14, 2024 · For a 2013 Jeep Wrangler Rubicon (3. 6L engine), normal operating temperatures should generally be between 203-226°F. 6L Pentastar engine is discussed. It would only do this when the speed dropped from 70-80mph to about 45 mph. It's not uncommon to see temperatures climb to 230-240F, especially when going up long hills or under heavy loads. But even the most reliable vehicles can experience issues, and understanding the basics of your Wrangler’s engine can be crucial for addressing them. Turned around, ran at 62, temp stayed at 228. The overflow tank is also over full, and I smell coolant while driving. 0L engine is designed to run at around 210 degrees with a 195-degree thermostat, and changing to a cooler thermostat may cause adverse effects like fouling . Jan 4, 2022 · The 2015 JK Wrangler (and other years with the 3. 6L Thermostat with Housing. If you observe any of these issues, it is important to have the thermostat inspected Get the Best Prices on OEM Mopar Thermostats & Parts for all Chrysler, Dodge, Jeep, and, Ram Models from Complete OEM Parts Catalogs on Our Onine Mopar Auto Parts Store! Jeep Wrangler 4. Dorman offers reliable thermostat solutions for this model. The 2012 Jeep Wrangler relies on a well-functioning thermostat to prevent overheating and maintain efficiency. 6L Pentastar engine) uses a 203F thermostat. 0L Code P0128 Easy Thermostat Replacement It’s Not Getting Hot in Here – Replacing Jeep TJ Thermostat and Housing Jeep CJ Fuel and Temperature Gauge Problems and Testing Keep temperatures under control in your Jeep with the Mishimoto Jeep Wrangler JK 3. Can you guys tell me what your information display says for both the engine coolant and oil temp for both city and highway in 90+ Merideth: Hey, guys. Mine Summary Changing the thermostat on a 2012 Jeep Wrangler is generally considered a straightforward process. But like any vehicle, it’s important to keep an eye on its temperature gauge to ensure it’s running smoothly. The temperature was acting very erratic. , 175-185F), especially on a 2012 or later model, your thermostat may be faulty or have been replaced with a lower temperature version Jul 7, 2014 · The RIPP 180 degree thermostat for the 3. 4 Pounds Item Package Quantity - 1 Product Type - HVAC CONTROL THERMOSTAT Jan 9, 2025 · The Jeep Wrangler, with its rugged off-road capabilities and iconic design, has become a favorite among adventure enthusiasts. Dec 5, 2021 · Access may require removing the inner fender splash shield. The 4. This article will guide you through diagnosing and fixing a P0128 code on a Jeep, ensuring your engine runs efficiently and preventing potential long-term damage. The coolant temp gauge was at the 3/4 mark. The analog temperature gauge on the dash is not a true analog gauge. Replace the thermostat, ideally with an OEM part. A thermostat failure can only happen in two ways. The thermostat in a Jeep Wrangler regulates the engine coolant’s flow and temperature. The consensus is that unless you are experiencing overheating issues, it's generally not recommended. The most common cause, especially on a Jeep Wrangler JK, is a faulty thermostat stuck in the open position. 6L V6 Genuine Gates Parts Includes original packaging and hardware Direct replacement auto parts Confirm vehicle fitment with Amazon Confirmed Fit Jan 31, 2022 · My Jeep is a 2011 Grand Cherokee Overland with a 5. So, how do you know if your Jeep Wrangler thermostat is bad? About 2012 Jeep Wrangler Thermostat Keep your ride's engine temperatures in check with a new 2012 Jeep Wrangler thermostat. It enhances your engine’s cooling strategy by reducing coolant temperatures sooner, helping to improve thermal stability during high-demand use or in elevated heat environments. Jun 17, 2023 · What year did the Jeep Wrangler have the 3. Once the thermostat detects that your Jeep is overheating, it sends a signal that coolant should be released. checked wiring harness and no broken wires or bent ears. Hidden Jeep Secrets You Didn't Know About | Jeep Wrangler & Gladiator | Jeep Tips & Tricks Jeep Wrangler JK 3. 6L THERMOSTAT REPLACEMENT P0128 Jeep Wrangler coolant sensor replace diy. 6L V6 Pentastar engine. 6L thermostat opens at a lower temperature (180F) compared to the stock unit (203F), which allows coolant to flow through the system earlier. Yes, this is my first post. I got a 180 Deg. Feb 2, 2025 · The Jeep Wrangler, with its rugged off- road capabilities and iconic design, is a favorite among adventure enthusiasts. I've noticed there are options in thermostat rated temperatures for my engine ranging from 160°F - 205°F. 0L engine, primarily to reduce engine heat. Coolant Temperature The coolant temp sensor is responsible for telling the Engine Control Module (ECM) the engine’s coolant temperature. :) The current problem I'm trying to solve on my '12 JK w/81k miles is the temp gauge started fluctuating between 1/2 - 5/8. Jun 13, 2013 · Vidi, vici, veni 2008 Jeep JK Wrangler Rubicon Unlimited jk-forum, jk forum, jkforum, jeep jk wrangler Reply Like ronjenx 1,754 posts · Joined 2010 May 27, 2024 · Just like a regular thermostat, the thermostat in your Wrangler is in charge of reading the temperature of your Jeep’s engine. Things that have been done: Thermostat has been replaced twice in the last 2 months (w/housing) Water pump replaced Serp belt replaced My 2012 wrangler is having inconsistent heat on all vents, runs hot and cold. Can someone confirm the stock stat temperature? I thought I read they were 195°. Oct 28, 2023 · Does your Jeep Wrangler have a P0128 thermostat code? Learn what causes it, diagnostic tips, and how to fix it by replacing the thermostat, coolant sensor, radiator hoses and more. This thermostat opens at a Nov 5, 2018 · P0128 Definition: Coolant Temp – Below Thermostat Regulating Temp The P0128 OBD-II trouble code is a generic powertrain diagnostic code (it has the same meaning for the Jeep Wrangler as any other vehicle). Oct 28, 2023 · This in-depth DIY guide covers how to find and change the engine coolant temperature sensor on Jeep Grand Cherokee, Wrangler, and Commander models with the 3. Aug 4, 2015 · If your temperature gauge is spiking into the red intermittently, it might not be the temperature sensor itself. Learn the exact sensor location, replacement tips, and more. Jeep Wrangler Forum provides answers from our community and over 22 other related forums. This Mishimoto Low-Temperature Thermostat fits 2012-2018 3. One common question that arises for Wrangler owners is “where is the thermostat on a Jeep Wrangler?” This guide Aug 30, 2019 · Hey guys, I just got a P0128 code on my '12 JGC with the 3. 6L engine. I drove it home and had it Mar 11, 2019 · I'm having a temperature issue. If your temperature gauge is acting up, how can you tell? Nov 10, 2019 · The thermostat in your Jeep Wrangler’s engine plays a crucial role in regulating its temperature. 6 Coolant Temp Sensor Replacement Mar 21, 2016 · About this item Ideal replacement - this engine coolant thermostat housing assembly directly replaces the original water outlet on specified vehicle years, makes and models Durable construction - this part is specifically designed to withstand extreme temperature changes and resist cracking and leaking Century of experience - for over 100 years, Dorman Products has provided quality automotive Feb 12, 2017 · Hi all. Some users report seeing temperatures fluctuate between 197F and 203F, with full opening occurring around 215F. Jun 11, 2022 · My wife was coming back from an 8 hour drive and told me the Jeep was giving her a hot engine message. Approx 1000 miles later, driving at 65 mph with a 30+ headwind, and a slight (maybe 2% climb), outside temp 40, engine temp climbed to 240, slowed to 62, temp stayed steady at 231. Aug 26, 2021 · A bad coolant temperature sensor has caused many to chase down thermostat and other non existent cooling problems. Jan 7, 2014 · For a 2014 Jeep Wrangler JK, the thermostat opening temperature appears to be around 203-206°F. What causes the P0128 code on a Jeep Wrangler? The most common cause for the P0128 code on a Jeep Wrangler is a faulty thermostat. 6 and I changed my thermostat but to be honest I'm now concerned that my engine may be hotter than normal. A malfunctioning thermostat may lead to various issues and should be dealt with immediately. Overview on how to replace the thermostat on 2012 - 2017 Jeep Wranglers with 3. Hardest part of the job is bleeding the air out of cooling system and getting Dec 28, 2023 · When your Jeep’s temperature gauge goes up and down, it’s a sign of an underlying problem. Forum users have shared their experiences and tips for a smooth replacement. Thermostat runs slightly high than normal. It would spike then drop back to normal range. Some common signs of a faulty thermostat include the engine running hot, coolant leaks, fluctuating temperature gauge, and poor heater performance. This 2012-2018 Jeep Wrangler 3. May 29, 2018 · I have a 2012 jeep wrangler and i have replaced thermostat couple times with new housing and the coolant temp sensor as well. Normal operating temperatures can range from 206°F to 226°F in day-to-day driving, and up to 240°F under high-load conditions like climbing hills My 2012 Jeep wrangler Jk has a mystery overheating problem, and I’m looking for advice, we’ve brought it to two different mechanics and they can’t identify the problem. Also, sometimes when I first turn on the heat I can see Nov 21, 2013 · About this item Genuine Mopar Thermostat with Housing - 5184570AJ Item Package Weight - 0. Sep 29, 2021 · Hello guys iam new here, My JK temperature gauge goes above the middle when going uphill for long time before the fan turns on and the temperature returns to the middle. g. Jul 28, 2020 · If your 2014 Jeep Wrangler is running hotter than normal, especially when under strain (like inclines or highway speeds), even after replacing the radiator, thermostat, hoses, and water pump, consider these potential causes and solutions: * **Normal Operation:** Some users report that the temperature gauge reading a bit above the midpoint is Nov 10, 2021 · Buy VQL Thermostat Housing For 2012-2018 Jeep Wrangler 2011-2015 Dodge Durango 2011-2015 Jeep Grand Cherokee Replaces 5184651AH 05184651AF: Thermostat Housings - Amazon. Jun 23, 2006 · The discussion revolves around whether to install a 180-degree thermostat in a Jeep 4. Protect your Pentastar by upgrading to the Mishimoto low-temperature thermostat. Apr 24, 2012 · The part was a little hard to find, when I looked for temperature sensor I kept Coming up with the sensor that is up by the thermostat,which is the one that feeds the PCM, when I searched at advance auto for temperature switch I found it,go figure! This is the one I used to replace it with, nine dollars and some change with the discount. Consider replacing your thermostat with a new 195-degree Stant thermostat, ideally a Stant SuperStat which helps bleed out trapped air. Thermostats control engine heat, ensuring optimal performance and longevity. is that safe and normal? Dec 27, 2015 · I have no interest in modifying to out of OEM spec, but it doesn't seem that there are non-OEM parts readily available at Pep Boys or Advance Auto Parts. The factory thermostat temperature is debated, with some sources indicating 203°F and others 195°F. A likely cause is a sticking thermostat or air trapped in the cooling system. Supposedly the only reason to go with thermostats rated Nov 29, 2013 · Im putting a new Champion radiator in and thermostat and housing. Oct 10, 2017 · Not sure that the lower temp thermostat was a great idea. One common culprit for engine problems is a faulty thermostat. Observed operating temperatures with the 180 degree thermostat should be no more than 180-190 degrees on the highway, but in the city, a tuner may be needed to adjust fan settings. Was just curious before I buy one. Some users have observed the temperature dropping from 203°F to 188°F during initial warm-up, suggesting the thermostat opens around that point. Order Your OEM Thermostat Housing (5184651ai) For Your 2011-2019 Mopar Vehicle From The Official Mopar eStore! A faulty thermostat can result in engine overheating and potential internal damage. This had the P0128 code. However, like any vehicle, it’s prone to occasional issues. Buy a 2012 Jeep Wrangler Thermostat at discount prices. If you're seeing significantly lower temperatures (e. so what else i have l left to check before i say might need a engine. While the CEL might disappear on its own and the Jeep might seem to be running fine, a faulty thermostat that's stuck open or opening too soon can cause the engine to run cooler than it should. Jun 18, 2025 · The 2012 Jeep Wrangler thermostat plays a crucial role in engine temperature regulation. Jeep Wrangler is among the car models that contain the Thermostat; this is a part that takes charge of the engine temperature and controls the quantity of the coolant that is supplied to the unit for it to run at the right conditions. Protect your ride by upgrading to the Mishimoto low-temperature thermostat, featuring an upgraded aluminum housing and galvanized steel bleeder screw for enhanced durability. So, today we're checking out the 203 Degree Thermostat and Housing fitting all 2012 into 2018, 3. 21 gearing. Check out the 2012 Wrangler thermostats above and choose the right part for you. Feb 8, 2020 · About this item This Gates Engine Coolant Thermostat is compatible with Jeep Wrangler 2018, 2017, 2016, 2015, 2014, 2013, 2012 3. The main culprits include a faulty thermostat, air bubbles in the cooling system, a misbehaving radiator fan, a leaky cylinder head gasket, or a defective gauge. P0128 indicates an issue with the engine’s Oct 15, 2014 · After researching, I was at a loss as it could be a slew of things from low oil to thermostat to coolant temp sensor. A faulty thermostat can result in engine overheating and potential internal damage. Sep 8, 2011 · The thermostat simply controls the lowest temperature point at which coolant starts to flow from the engine block, to the radiator. So, the question arises: what temperature should my Jeep Wrangler be running at? This blog post will dive into the intricacies of Jeep Wrangler temperature Jul 15, 2023 · I’m changing out the thermostat and was wondering what temperature it would take? I thought I would pick up one before taking the old one out any suggestions would be appreciated thanx! Do-It-Yourself instructions for replacing a thermostat housing in a 2012 Jeep Wrangler JK with a 3. I chocked it Jan 8, 2025 · Curious what brand thermostat people are using? Gates is typically been a good brand and is half the price of a new Mopar thermostat. However, if your thermostat is faulty, then this signal for coolant is never given. Choose top quality brands APA/URO Parts, API, Calorstat, Four Seasons, Gates, Mahle, Mishimoto, Mopar, Motorad. The cooling fan is designed to activate around 224-226°F (or earlier if the A/C is on). Jul 17, 2021 · If your Jeep's temperature is running higher than expected after replacing the thermostat and housing, especially around 212-215°F at highway speeds, it's worth investigating. 6L Jeep Wrangler JK models. It needs a new thermostat. When i am on the interstate, if the automatic transmission does not shift right (due to the tire size) and the RPMs get up to 3000, the temperature gauge rises to almost 3/4. Code P0128 could be either the thermostat or the coolant sensor . RIPP claims their testing shows an average of 10 degrees cooler over an 18-month period. What are you guys running and why?:confused: Should I have got the 195? Apr 5, 2025 · The Jeep Wrangler is a rugged and capable off-road vehicle that’s loved by many for its versatility and adventurous spirit. Jun 21, 2022 · Zerex G-05 used to top off again. But if I let off the gas and the Feb 7, 2015 · To replace the Engine Coolant Temperature (ECT) sensor on a 2013 Jeep Wrangler JK to resolve a P0128 code, the ECT is located on the driver's side, toward the rear of the engine, near the firewall. When it malfunctions, it can lead to overheating and reduced performance. 6-liter engine was introduced in the 2012 Jeep Wrangler models and is available through the present models. The thermostat is a +/- 210 degree thermostat so it does run hotter than most vehicles stock. The high electric fan typically kicks in around 226F to cool it down. After replacing it I was pulling a small trailer at highway speed. Some of the most common symptoms of a bad thermostat are no heat, a spiked temp gauge, a blown head gasket, and more. Avoid "fail-safe" thermostats as they can cause premature opening Jul 24, 2023 · Problem resolved About a year ago I replaced my thermostat with a mishimoto thermostat that opens at 180°. Today I replaced the coolant sensor on our 2014 Jeep Wrangler JK. 6-liter JK Wranglers. I have a 2012 JKU on 35's with the dreaded 3. This is a fairly Dec 21, 2016 · The P0128 code indicates that the coolant temperature is below the thermostat regulating temperature. I only changed the thermostat and all looks good so far. When driving the temperature begins to creep to the 3/4 mark on the heat gauge. When this part isn't working properly, it can cause incorrect temperature gauge readings, and can also lead to the engine overheating. The temperature sensor is a two-wire Negative Thermal Coefficient (NTC) sensor.