2021 Jeep Compass: check engine light

Filed Oct 31, 2026 · Engine · FL

On October 30, 2026, my 2021 Jeep Compass Limited, with approximately 67,000 miles, unexpectedly became inoperable despite operating normally the previous day. When attempting to start the vehicle, the dashboard displayed a “Coolant Temperature High” warning accompanied by a flashing check-engine light. The engine made clicking noises but failed to start, while the radio and other electrical components remained functional. The temperature gauge remained at its lowest reading, and there were no visible signs of overheating, smoke, or unusual odors. The battery and alternator were tested and found to be functioning properly, and diagnostic trouble code U0402 was identified. I am concerned because the federal safety agency previously investigated similar coolant temperature warnings, engine shutdowns, and failure-to-restart incidents involving 2019–2020 Jeep Compass vehicles under investigation PE22-013. Although my vehicle is a 2021 model, it is exhibiting similar symptoms, raising concerns about a potential recurring safety-related defect. An unexpected loss of engine power while driving could create a serious collision risk. I am requesting that the federal safety agency investigate whether the 2021 Jeep Compass is affected by a similar defect and determine whether a safety recall or manufacturer corrective action is warranted.

Filed Sep 6, 2026 · Engine · TX

I am filing a safety complaint regarding my 2021 Jeep Compass Limited due to repeated coolant loss, overheating/high-temperature warnings, and eventual engine failure. The vehicle began losing coolant and required frequent refilling. The problem progressively worsened until coolant would immediately leak out underneath the vehicle when added. I paid approximately $1,400 to have the radiator replaced, but the same problem returned approximately two weeks later. The vehicle subsequently developed additional problems including shaking, a check-engine light, Cylinder 1 misfire, and diagnostic code P0117 related to the coolant temperature sensor/circuit. The vehicle also displayed a warning that the oil temperature was too high and the engine needed to cool down. The vehicle eventually became undrivable, and I believe the engine may have locked up. The progression from severe coolant loss and overheating to misfire, high-temperature warnings, and possible catastrophic engine failure is concerning. This vehicle is used to transport my children, including daily school transportation. I am concerned that a sudden loss of coolant, overheating, loss of power, or engine failure while driving could create a serious safety hazard. The radiator replacement did not resolve the underlying problem, which makes me concerned there may be a larger defect involving the cooling system, temperature control, or related engine components. I am requesting that the federal safety agency investigate whether similar coolant-loss, overheating, temperature-warning, and engine-failure problems are occurring in 2021 Jeep Compass vehicles and whether a safety defect may exist.

Filed Nov 25, 2025 · Electrical · NJ

On November 1, 2025, while backing my 2021 Jeep Compass out of the driveway, I noticed the rearview camera started 'jumping' and displaying colored lines. I pulled the vehicle in front of my home, and suddenly there was loud banging and the engine light started flashing. I immediately turned the vehicle off, and it would not start again. I contacted the Jeep dealership Monday morning, November 3, 2025 to advise the vehicle started making loud noises, engine light flashing, rearview camera not displaying properly. The Jeep was subsequently towed to the dealer. I was advised by service tech that there was a fluid leak in the trans pump area. I was also told the vehicle did not pass a battery check, and gave authorization to replace the main battery. The service tech advised the radio needed to be replaced, I told him the radio played fine, but the rearview camera malfunctioned while backing the car out. He said the rearview signal is from the radio, I declined to replaced the radio. I have had several issues with the 2021 Jeep, included oil leakage, and now transmission leakage. I also note certain 2021 Jeep Compass models have rearview camera issues, and upon calling Stellantis November 24, 2025, they advise my particular vehicle is not affected. I disagree. The vehicle has regular maintenance (oil changes) and has 24,200 original miles. I believe this to be a defect and also a safety issue.

Filed Aug 12, 2025 · Acceleration, Electrical · GA

Purchased Jan 20 2024 Battery issues started in April 2024, battery started melting a particular component, i had to replace the battery, the melting was still happening, I went to another jeep location, to get a fuse component that keeps wires separate, the melting still happened. I told the original Jeep dealership about each thing, they told me to bring it in finally and told me I had to pay for a wire harness to be run throughout the car, 3000, to 1800, and then 0, for a "malfunction they found and fixed" After Wire harness situation and price de-escalation after i told them they shouldjust take the car back because i dont have 3000; the start stop now not cooperating, has been happening since Aug 2024 in daytime with lyft rider in car. Stopped for a few months then repeated in October at night with other guests in car. Today (07/14/2025) Before 2 shift of lyft (before 7:50pm) The car stopped 6 times, 2 times with 2 different lyft riders in car. 4 times by myself, 1 time on the highway 2nd to 1st lane, with 18 wheeler behind me. This time it started back immediately but with 2nd passenger in car and 3rd time on my own it took several minutes before turning back on. Car stopped driving again today 07/15/2025 (recorded video) Now the car has a serv 4wd and the engine light is on, and I dont know whats wrong with the car. Its stressful, and I'm ready to give the car back for trade in value. Car still stops when it wants, its difficult to get a video as its happening, but the car just starts shaking, and stops driving no matter where I am. Everything will be easier to explain over the phone or in person, I am very scared of this car, this is my only source of income and now the Check engine light is on and I don't know whats wrong with the car. I've never had this many issues with a car and its the youngest car I've had. Ive seen many complaints about Jeep compass in particular after 2016. Having more problems and all similar to each other as the years go by.

Filed Mar 26, 2025 · CA

Since I first got my brand new JEEP COMPASS in 2021, the tire pressure light would flash on and off, with a warning that my tire pressure was low. When I first saw this light come on, I obviously didn't realize that this light was faulty and inaccurate. I took it to the dealership to check my tire pressure and it was completely fine and normal, so all of that worry and time taking it to the dealership for nothing. That initially happened only about four months into having the brand new vehicle. Since then, that light still flashes on and off, and I ignore it because I know that it is faulty. This is a major safety concern, because if my tire pressure is low, I won't ever know if it is accurate or not, so I could be driving with low tires and potentially get into a bad accident. Additionally, the automatic stop / start button has come on multiple times. It initially came on May 2024, which then triggered the check engine light. I had to take in my car due to this issue, and it was in the dealership for a week, resulting in a thousand dollar charge, and all of the Ubers I had to pay for. The automatic stop / start button killed both of my batteries and I had to replace those. Not even a year later, March 2025, the automatic stop / start button light came on my dashboard again. I took it into the dealership yet again this month, and it was in there for a full week, so I was without a car that entire time having to pay for Ubers and so on. When I picked up the car, the mechanic informed me that this is a common issue and will continue to be an issue. In his professional opinion, he thought this should be a recall. I know it his not his call, but I do think that there should be some sort of resolution or help that I receive for this. I know that this will continue to be an issue, especially a SAFETY issue, so what is the resolution here? Please help.

Filed Feb 4, 2025 · Engine · PA

I have replaced both batteries and the alternator. The stop/start light comes on and the red warning to pull over safely the vehicle will shut off soon and the engine light comes on. The vehicle is now telling me to service transmission. The dealer doesn't know what's wrong with it. I want this taken care of.

Filed Oct 3, 2024 · Electrical · 38,000 miles · OH

The contact owns a 2021 Jeep Compass. The contact stated that the check engine, crash avoidance assist, START/STOP, air bags, and other warning lights were illuminated. While driving at various speeds, the transmission was slipping. Additionally, the vehicle could be started without depressing the brake pedal. There was a burning odor entering into the cabin of the vehicle. The vehicle had been taken to the dealer who was unable to determine the cause of the failure. The contact stated that the dealer had placed an electronic chip in the vehicle; however, the contact was unable to recall the exact name of the computer chip. The vehicle failed to start after the chip was installed, causing the dealer to remove the new computer chip and replace it with older chip. The contact stated that when the battery was replaced, the warning lights were no longer illuminated. The manufacturer was not made aware of the failure. The failure mileage was 38,000.

Filed Dec 12, 2023 · Engine, Fuel system · KY

When stopped at a stop sign (on a slight incline, if that could be a factor), the Compass suddenly lost power. No reaction from pressing the gas pedal at all. In Drive or in Reverse. The Check Engine light came on and the temperature gauge went all the way up. Putting it in Park and restarting cleared the Check Engine light and the temperature gauge was right back to normal. Almost like nothing had happened. Thankfully it was a small intersection with no other traffic. But could this happen on the freeway?

Filed Apr 26, 2023 · Brakes, Electrical · TX

The Jeep's engine decided to shut off at a red light. This jeep has the automatic shutoff for the engine when idling too long. I could not restart the engine. I blocked 2 lanes of traffic, and was unable to push the vehicle out of the way. I Tried restarting the engine several times. The accessories would come on, but the parking brake would NOT disengage and I had several issues trying to get the shifter into neutral to push the car out of an intersection. The fire department lucky was behind me after this happened, and helped me so did local police. 5 different people could not get the car to start or engage into neutral and disengage the parking brake to move the vehicle to a safe location. This was a rental so lucky I am not the owner of a failure of a jeep. This was an emergency situation while it was raining in traffic at an intersection. Police called a tow truck to tow the jeep out of the intersection because it was inoperable at this point. This is the strangest issue I have ever had with a vehicle and I am a automotive mechanic. Jeep had only 50,000 miles and no previous issues. Engine light was illuminated and I didn't have a scan tool with me (out of town). The vehicle was taken to a service shop requested by the rental company. We never knew the root cause. My advice if you have to spring for a jeep go for a bigger and better model. These and the patriots are the worst jeeps in terms of reliability.