reads codes 27, 28, 31, 41, and 63 on MIL
2006-12-22 14:36:56 · 2 answers · asked by mike b 1 in Cars & Transportation ➔ Maintenance & Repairs
Possibly dirty valve body. When did you last change the transmission fluid. It's supposed to be changed every 75,000 miles.
2006-12-22 14:41:12 · answer #1 · answered by bestbet77 3 · 0⤊ 0⤋
The error codes 27 28 are gear switch is bad or bad wiring connections.. The code 31 is Turbo Over boost. That the wastgate system is malfuctioning....code 41 is cylinder select error and it can be caused by a wrong Mem CAL firmware in the ECM. and 63 is Cruise Control servo is not working..
Judging by this you may have a bad ECM in that car I would go to a junkyard and pick up a diffrent one that goes to that car. and see if the problems go away... I bet someone put in a diffrent Mem CAL in it and its not for the car with the engine and transmission setup you have it can lead to the problems you got. Most Chevy's and Pontiacs and Oldsmobile uses the Same ECM but diffrent software that stored for the MEM cal for different cars so they can use the same computer and not have to design diffrent Computer modules for other cars. they just have to change the Mem cal to make it work for different setup. And the Vacuum Modulator on GM hydramatic are known to go bad where transmission fluid is sucked into the Vacuum line and burn inside the engine which will make it smoke out of the exhaust. It would not hurt to replace that too.
2006-12-22 16:06:51 · answer #2 · answered by James S 6 · 0⤊ 0⤋