Table 1 shows 17 common engine and engine cooling related problems of the 2012 Jeep Wrangler. The number one most common problem is related to the engine and engine cooling (82 problems). The second most common problem is related to the engine clicking and tapping noises (19 problems).
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. Read details...
The lifters (headers) have gone bad. Incredible ticking noise from the engine in drive and idle. As rpms increase the ticking is louder. The only way to fix is to replace the headers. I have read a multitude of complaints on the NHTSA page regarding this and additional complaints all over Jeep Read details...
Cam sensor failed. Check engine light and traction control light appeared. Replaced and same problems occurred. May be wiring or cam/rocker issues. Read details...