2020 Jeep Wrangler: misfire or rough idle

Filed May 22, 2025 · Brakes, Electrical · RI

My vehicle had a rough idling and then flashed an autostart symbol and stated on the dashboard that my autodash has been disabled. Later that day I drove my vehicle again, then the dashboard lit up like a christmas tree and every light was on and my car went limp. I pulled over on the side of the road and let my car stay off thinking it would help. Waited some time and tried to turn it on and it wouldnt turn back on until the 5th attempt. took my vehicle to jeep a few days later where they diagnosed it saying it needs a new ABS control module. However, the control module is on back order with no ETA in sight. There are multiple other people in my exact situation waiting 6+ months for their ABS control module. My car is undriveable as it has no traction control, will go limp, and no ABS system. I have been without my car for a month and they have not provided a loaner. To my research this has been an issue since september of 2023 and has yet to be a recall.

Filed Apr 25, 2025 · Driver assistance, Engine · 124,000 miles · IL

The contact owns a 2020 Jeep Wrangler. The contact stated while driving 35 MPH and decelerating while approaching a stop light, there was misfire coming from the engine, and the traction control activated, causing the brakes to become inoperable. The check engine warning light was illuminated. The “Service START/STOP System” message was displayed. The vehicle was taken to the local dealer, where it was diagnosed and determined there were metal shavings in the oil. The dealer recommended an engine replacement. The vehicle was not repaired. The manufacturer was contacted, and confirmed there was no warranty or recall coverage on the vehicle. The failure mileage was approximately 124,000.

Filed Mar 31, 2025 · Engine · MN

The engine started to misfire due to bad components. The check engine light did not come on to indicate there was an issue until it was too late and the damage was done not only to the engine but other components as well. This was extremely dangerous as the issues resulted in loss of power while driving with my young children in the car as i had just picked them up from school. The vehicle has been inspected by a mechanic who believes that at this point the engine may need to be replaced entirely. My vehicle just passed 100,000 miles so is no longer covered by warranty and now I am stuck with over an $11,000 bill to replace my engine because it was built poorly to begin with, hence the class action lawsuit against Jeep for this particular motor.

Filed Feb 16, 2024 · Engine, Fuel system · MI

An internal defect in the 2014-2020 Jeep Wranglers with the 3.6L Pentastar V6 engine affects its rocker arms, lifters, and related valvetrain components, including the engine control module (ECM) software that controls the precise timing and function of the lifters. Specifically, the rollers of a Pentastar engine’s rocker arms prematurely wear down, become loose, and then drop, which shifts the rocker arm out of alignment. The rocker arms then come into contact with the cam, scraping both components and creating metal debris. This Pentastar V6 engine defect creates an audible ticking sound that stems from metal particles and debris from the failed rocker arms and other components, contaminating the engine oil and circulating throughout the engine. This defect also causes engine misfires, resulting in bucking and surging, decreased engine performance, hesitation, loss of power, premature wear on internal components, and eventually catastrophic engine failure. The check engine light came on in my 2020 Jeep Wrangler with 69,000 miles. After having it read by a dealer, it showed the P219A code, Bank 1 air/fuel imbalance. The dealership told me that if the Jeep was running fine, I did not have to worry about it, as it was likely an O2 sensor. The code was cleared, and the P219A code returned the following day. It was driven approximately 500 miles before noticing that it began idling roughly and had an engine tick, which the dealership confirmed to be a valvetrain issue. The rocker arms, lifters, valves, and camshaft components of the Pentastar V6 engine in my 2020 Jeep Wrangler with 70,000 miles have failed. Three Jeep dealerships in my area and MANY online forums stated that this is a common occurrence with this engine, which has escalated my concern about this problem.

Filed Apr 28, 2023 · Engine, Transmission · PA

Engine revved at 5000RPM would not switch from 1st gear. Now engine is showing a cylinder misfire which is moving from Cyln. 4 to Cyln 3 and so on.