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1991
199,999 Miles
Hello how can I fix my PCM on my car and and my A/C not working
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1991
54,560 Miles
car missed at idle then shutting down while driving down highway. took car to 2 dealerships plugs,wires,cap and rotor button replaced. 3 cats put on an egr o2 sensor new battery fuel injectors and all this work I still had same problem. solution; I was ready to scrap the car then an old mechanic that knew nothing about computers told me to check all my grounds. I thought he was crazy but I had nothing to loose. ran all grounds down cleaned them and guess what,, car runs like new I ask him how he knew that he just smiled goes to show computers cant beat wisdom made me feel pretty stupid. p.s. don't forget the ground down by the starter that was my problem the whole time
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1991
149,000 Miles
Vehicle at first didn't start up right away then after about 2weeks started fine until maybe a month later the dash displayed various service codes and dash start blinking crazy one day cut car off wouldn't start at all towed to dealer who informed me the PCU had to b replaced $ 1500
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1991
59,000 Miles
I have same problem with code C1298 code reader said powertrain module serial data link malfunction . It also said class 2 .I have not yet investigated this yet . Because my other car is being repaired . I find it strange I have 2 totally different cars both have ABS and Traction control lights on. If anyone can answer this question I would be grateful. I have other things wrong with cadillac and I definitely don't want to over pay again for all the codes and repairs. This just all happened at 59,000 miles.
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1991
0 Miles
My ground cable broke and shut down the whole vehicke. Took a week to notice the cable then it has to be welded in ordered to fix the problem will causr the speed odmeter to go haywire an sometimes not allow the vehicle to start
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1991
119,000 Miles
Digital cluster goes haywire.check engine light comes on. Throws code p0430.
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1991
155,000 Miles
I'm not sure how to fix this or if this is even the issue i currently have but a message came across my dash saying "Service Ride Control" I JUST bought this 1996 Cadillac DeVille yesterday off of a lady at aprox. 115,000 miles on it. When i got a new battery for the car it started right up and drove pretty well. However, i stopped the car at my house and the car has this feature to where the radio doesn't turn off until (I believe) 10 mins OR you open the door and exit the car. Well i sat in the car for a bit talking to my friend and when i tried to start the car up the interior lights started flickering non stop and the dash lights kept flickering as well Fading out and coming back on and the radio also kept doing the same thing. Then I got out the car and heard an audible ticking sound coming from under the hood in the fuse box area. I found the "Inadvert Power Relay" and the ticking sound was coming from there. No biggie, i replaced the relay but I'm still having the same issue, only without the audible ticking sound from the relay. Ultimately it caused the new battery to die because even after i took the keys out of the ignition and closed the door the interior lights kept flickering on and off through out the night. Any idea what it could be?
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1991
84,000 Miles
I just found out about this diagnosis. Hard to start, gear shift with a clunk, radio not working, low gas mileage. Engine had been power washed
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1991
106,000 Miles
Engine is hesitating and shaking, sometimes runs fine but sometimes won't build up rpms. Throws codes for pcm, abs module, and several sensor circuits bad. I suspect that either the pcm is bad (if the codes for the other modules are read /processed in it), or that it has a bad power supply or ground in common with them. But this is not conclusively diagnosed.
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1991
250,000 Miles
Vehicle is surging at random times and won't accelerate past 50mph at times