Four problems related to automatic transmission control module have been reported for the 1997 Jeep Grand Cherokee. The most recently reported issues are listed below.
Engine stall/shut off on a highway at 70 miles/hr in center lane of a five lane interstate highway with plenty of gas in the tank. Has happened three times on different days. I'm original owner. Heavy failure analysis done. Allege that Jeep cut corners that risk driver safety. They used and may still be using cheap chinese microprocessor chips in their program control modules (pcm). Fred bailey fatal accident is telling. His Jeep shut down on a bridge. Plenty of gas in the tank. Tractor trailer plows into the back of this Jeep (like mine). The gas tank explodes and he dies. . Read more...
My Jeep Grand Cherokee has been sputtering, stalling when stopped and when driving, backfires blown apart 2 mufflers. It will not show a check light or give an error code when hooked up to a computer. Have researched online and found several people with same issue. Have done as they have and replaced nearly every sensor. Have yet to replace pcm/ecm. Don't know if this will fix due to some online have and still having the same issue. Like the people online I have taken it to different mechanics, none of which could duplicate or find a problem. Surprised with as many people having this issue Jeep hasn't resolved this. I think dealerships are aware of this issue because some people online have traded their Jeeps in and gotten very little towards trade-in.
Engine stalls either at speed or during idle after 20 minutes. Will continue to stall for about 4 minutes, sometimes very hard to start during this time. Then vehicle will run fine with no problems for several hours. The next day, or after vehicle has been sitting for several hours, the process will start again. Every day it will stall after about 20 minutes - sometimes while turning, which will cause a total loss of steering ability, or while on the freeway, or while at a red light or intersection. I narrowly escaped an accident when it stalled and a big rig almost slammed into me. I have been stranded in the middle of a busy intersection multiple times because of this. When the car stalls, sometimes it runs very rough and backfires, which caused the catalytic converter to blow out. Now the catalytic converter rattles and caused my emissions test to fail with high no(ppm) output. I'm going to need to change the pcm and the catalytic converter to fix this, but this was covered under a recall for 1996 vehicles with this same problem. Jeep issued an emissions recall in late 2006 to update the powertrain control module (pcm) software on certain 1996 vehicles. As part of the recall, the catalytic converter will also be inspected for damage and replaced as necessary. 1997 vehicles experiencing the exact same problem were not included in this recall for some reason. Please include the 1997 vehicles in this recall.
Engine check light comes on and stays on for no apparent reason. Codes indicated the vehicle had been towed, and that the vehicle had lost traction, which was not the case.