2012 Jeep Wrangler: engine stalls while driving

Filed Jul 7, 2026 · Engine · TX

The engine's cylinder head/valve train has failed internally, allowing combustion gases to enter the cooling system — confirmed via a chemical block test performed by a master automotive technician on November 29, 2024, which verified combustion gases present in the coolant. This is a widely documented defect on this engine and model year, related to valve seat erosion in the cylinder head. Symptoms first appeared in June 2018 as an unusual higher-pitched, stressed sound from the engine. Over time this progressed to recurring, confirmed misfires on cylinders 1, 2, 3, and 5 (diagnostic codes P0300, P0301, P0302, P0303, P0305) and a mixture control fault (P219B). The check engine light has intermittently stayed illuminated for months at a time, then gone off for extended periods while the same fault codes remain stored and confirmed by a diagnostic scanner — currently the light is off but the codes persist. The vehicle frequently runs rough enough that the engine must be turned off and restarted to temporarily return to closer-to-normal operation. Noticeable vibration is felt during much of this pattern. Spark plugs, ignition coils, oxygen sensors, and the PCV valve have all been inspected/replaced and ruled out as the cause on multiple occasions over more than a year, isolating the cause to the cylinder head itself. This creates a driveability and potential stalling/hesitation risk, though no crash, injury, or fire has occurred to date. The vehicle has not been formally inspected by the manufacturer, police, or an insurance representative. The affected component remains in the vehicle and is available for inspection upon request.

Filed Oct 29, 2025 · Engine · CA

The vehicle exhibits a persistent valvetrain ticking noise associated with the rocker/lifter/cam components of the 3.6L Pentastar V6. The engine makes a rhythmic metallic tapping at idle and during acceleration. The noise has progressively worsened, leading to rough idle and occasional misfires. This issue is documented in multiple Stellantis technical service bulletins (e.g., TSB 09-015-24 and TSB 09-011-25) which attribute the noise to hydraulic lash adjuster and cam/rocker wear. If unaddressed, the failure can cause camshaft damage, metal debris contamination, loss of power and potential engine stall, posing a safety risk. The vehicle is available for inspection. The problem has been confirmed by independent mechanics who recommend replacement of the rocker arms, lifters and camshaft to prevent catastrophic engine failure.

Filed Sep 30, 2025 · Engine · MO

The vehicle exhibits a persistent valvetrain ticking noise associated with the rocker/lifter/cam components of the 3.6L Pentastar V6. The engine makes a rhythmic metallic tapping at idle and during acceleration. The noise has progressively worsened, leading to rough idle and occasional misfires. This issue is documented in multiple Stellantis technical service bulletins (e.g., TSB 09-015-24 and TSB 09-011-25) which attribute the noise to hydraulic lash adjuster and cam/rocker wear. If unaddressed, the failure can cause camshaft damage, metal debris contamination, loss of power and potential engine stall, posing a safety risk. The vehicle is available for inspection. The problem has been confirmed by independent mechanics who recommend replacement of the rocker arms, lifters and camshaft to prevent catastrophic engine failure.

Filed Mar 2, 2025 · Electrical · FL

The 2012 jeep jk wrangler has serious electrical issues. The jeep randomly stalls while driving and sometimes won’t start at all. Right before it stalls, every light on the dashboard flashes and continues to flash until the car dies. Replacing the battery doesn’t fix the issue. Numerous complaints about jeep wranglers TIPM issues have been ignored by authorities. I suppose people will have to die in a crash or spends thousands fixing the TIPM or electrical issues before getting relief.

Filed Apr 4, 2023 · Engine, Fuel system · VA

Engine Stalls Randomly while Driving. Will crank over several times and over approx 10-15 min. of cranking(Say every 3-5min) vehicle will and will restart. No check engine lights and no warning. The loss of power can be dangerous since brake and steering assist require engine to be running. Vehicle will be fine for several days local commute and problem will recur without warning, usually on longer commute. Vehicle is unsafe and unpredictable.

Filed Jul 12, 2022 · Engine, Transmission · WI

While driving the car randomly stalls. I lose power steering and braking. The car will not restart. This issue has been recorded by the dealer. The vehicle was last inspected on July 5th. I have been issued a Jeep Care case manager, case # 82963828. There are no warnings, while driving makes a left-hand turn the car just stalls!

Filed Jul 4, 2022 · Electrical, Engine · WI

Starting out at a stop light, engaging the clutch to start moving, I depressed the clutch to shift into second gear while making a turn, the vehicle stalls, losing all power.

Filed Jul 4, 2022 · Electrical, Engine · WI

Starting out at a stop sign. engaging the clutch to start moving, while shifting into 2nd gear while turning the vehicle stalls. Losing all power steer and brakes. I try to re-start the car i get a crank no-start scenario. Wait 3-5 min, retry starting the vehicle starts.

Filed Jul 4, 2022 · Engine, Fuel system · WI

While driving making a turn, shifting from 1st to 2nd gear, and vehicle stalls losing all power. The vehicle has been to the deal multiple times and the issue can not be duplicated. The vehicle has been inspected multiple times and there are no known issues. No-fault codes are thrown. I stalled in the middle of a busy intersection, with my children in the car. I had to push the vehicle to safety!

Filed Jul 4, 2022 · Electrical, Engine · WI

While driving making a turn, shifting from 1st to 2nd gear, and vehicle stalls losing all power. I had a crank no-start scenario! The vehicle has been to the deal multiple times and the issue can not be duplicated. The vehicle has been inspected multiple times and there are no known issues. No-fault codes are thrown. I was able to cost to a safe location, and wait. after 3-5 min the vehicle restarted.

Filed Jul 4, 2022 · Electrical, Engine · WI

While driving making a turn, shifting from 1st to 2nd gear, and vehicle stalls losing all power. I had a crank no-start scenario! The vehicle has been to the dealer multiple times and the issue can not be duplicated. The vehicle has been inspected multiple times and there are no known issues. No-fault codes are thrown. I was able to cost to a safe location, and wait. after 3-5 min the vehicle restarted.

Filed May 28, 2022 · Engine, Fuel system · WI

While driving the car stalled. Loss of power steering and braking. I was able to coast to a safe location. I tried to restart, but Crank- No Start.