Eight problems related to automatic transmission control module have been reported for the 2006 Jeep Grand Cherokee. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2006 Jeep Grand Cherokee based on all problems reported for the 2006 Grand Cherokee.
The pcm is not communicating between the computer and the transmission. It's making the transmission jump, loose power while driving, warning saying transmission over temp (can come on even when you just start driving), code p1603-pcm internal dual port ram, communication failure. The rpm's have ramped up and down while at a stop, loose power while driving, and can even turn off while driving. Eventually the alternator went bad. Replaced alternator and battery have been replaced 8/16/20. Eventually if the ecm is not replaced then it'll kill the vehicle. The transmission over temp started around 60,000 miles. This issue has steadily gotten worse overtime, became more frequent, and more dangerous. I've read of lots of people have the same issue and there's been no recalls. I feel there should be a recall for safety issues. Please look into the number of people having the same issue.
The vehicle goes into what's called a �limp mode� which essentially means it has lost communication with the transmission control module and the vehicle will not shift.
The contact owns a 2006 Jeep Grand Cherokee. The contact stated that the transmission control module dropped out of the vehicle causing the vehicle to come to a complete stop. The vehicle was taken to an independent mechanic, who stated that this was a known failure with this year and model vehicle. The manufacturer was made aware of the failure and explained to the contact that the part needed was on back order and there was no time frame for when the repair could be performed. The vehicle was not repaired. The failure mileage was 52,000.
The check engine light would come on and go off. . I was driving around 60 mph the car shifted into neutral and lost power. . . I was able to steer to the side of the road but I was in three lanes wide of traffic on the highway and had I not been in the lane closed to the side of the road I could have been badly injured. Within the time frame of three weeks it happened 4 times. . . All when I was driving highway speeds except once the car shifted into neutral on its own and powered down when I was at a stop sign in town. The check engine lights comes and goes so fast by the time I can get to a repair shop and have it scanned its usually off. I was able to scan it once and it read a code for "transmission control module". . . The car runs great but I don't understand why it just powers down. How many people have to get injured from this failure before someone fixes it! this is absurd!.
Was going down interstate 40 coming from little rock ark. Jeep started to slow down pressed on gas would not speed up. There are so many eighteen wheelers on that interstate. I managed to pull over. Started to shifted from park to drive and drive kicked in. I had two children in the Jeep with me . I can not even think about what might have happen if one of those trucks had hit me in the rear. This is a 2006 Jeep Grand Cherokee laredo. I have looked on line for recall there was a recall on the 2008 models . The transmission control module . I have been told that is the problem with my Jeep. When I made in home this happened again coming down my street in halls TN. Got to my drive stop pulling. Put in park back to drive made in driveway. I have seen on line this is a problem with lots of Jeeps not only mine. Please fix this problem before someone get hurt or dies. What does it take!!!!!!! help!.
Check engine light would come on (& go off) repeatedly. Additionally, transmission would 'jerk' on deceleration just before vehicle stopped (light drivetrain had to catch up with the engine). Took vehicle to dealer, who stated there was nothing wrong. Returned several days later with same engine light illuminated. Dealer kept vehicle for over a week; finally determined a daughter-board on the transmission control module had failed and replaced ($600). Two days later, check engine light came on again. Returned to the dealer, who (after 3 days) determined that the entire transmission control module had failed ($1000 to replace). Replaced entire tcm (which other dealers told me seldom if ever fails). 3 months later, problem returned.
The contact owns a 2006 Jeep Grand Cherokee. While driving 50 mph and depressing the brake pedal to stop, the vehicle would abnormally lunge forward. In addition, while driving highway speeds, the vehicle would sporadically fail. The contact took the vehicle to a dealer and they repaired the tcm. Several weeks later, the failure recurred without any warning. She called the manufacturer and was referred back to the dealer. The dealer stated that if the diagnostic machine did not provide any codes, they could not successfully remedy the failure. The failure mileage was 17,000 and current mileage was 25,000.
Transmission will sporadically choose not to engage allowing the vehicle to free wheel. Problem noted mainly after initial start when left overnight and will go away after allowing the vehicle to warm up sufficiently (3-5 minutes).