Two problems related to automatic transmission control module have been reported for the 2012 Jeep Wrangler. The most recently reported issues are listed below.
I love my Jeep, but for the past year we have had a love hate relationship. Today I received a letter indicating that the power control module might need reprogramming. Interesting enough this went bad on my 2012 Jeep a year ago. Shortly thereafter my engine failed. Now that I see there was an issue with the pcm needing reprogrammed it made sense why a Jeep with barely 90,000 miles would have an engine that failed, especially considering that I was never rough with it, and always gave it appropriate oil changes. It took me the better part of a year to pay off the cost of the new engine, and when you've got a car this new, there really isn't a good option besides knuckling down and paying for the fix. I would love to love my Jeep again. When this happened it was very cold outside, my Jeep sat outside overnight. While driving to school the temp gauge pinged. I limped it back to a dealership (no Jeep dealers in my hometown) and eventually found out the problem. After what I thought was an initial fix, it was determined that the engine had actually failed and I subsequently had it replaced at a Jeep dealership. I can provide proof of the replacement if necessary.
Vehicle is currently (Dec 2012) at dealer having heads/valves replaced (10th day after waiting 10 days for parts), original report 9 Nov: idling engine continues to be very rough, much rougher than when reported to dealer on November 9 2012, dealer did pcm reflash/update as stalling maneuver, after which problem worsened and mil came on vehicle is vibrating abnormally when stopped and idling, all passengers feel the car shaking, almost stalls at times idling engine changes speeds and sound intermittently and is running very loud engine always had slight ticking on left side since new but was never loud or rough loss of power felt at acceleration at top of gears (manual) white exhaust emissions after cold start, this never happened before engine light mil is on and off repeatedly - reads p0306 cylinder 6 misfire gas mileage severely affected (approx 25% worse), car now has 18k miles; dealer said it was ok to drive it - however driving it may cause other damage this is 3rd visit to dealer - when problem first reported dealer service dept said I might have put water in the gas. I have had to push the dealer to fix this and the general attitude has been adversarial and not helpful.