Powertrain Control Module (PCM) Can Fail Affecting Drivability on Cadillac DeVille

The powertrain control module (PCM) can fail causing stalling, and various engine and transmission drivability concerns.

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Average mileage: 104,078 (15,000–150,000)
5 model years affected: 1990, 1991, 1992, 1993, more2003
13 people reported this problem
7 people shared problem details
mine runs god when cold bad when warm pcm sendind 2 volts to pcm instead of 5 volts
1993 Cadillac DeVille100,339
No drive but . but shift in all other gears how do I fix it
1990 Cadillac DeVille120,000
my 2002 Cadillac deville act like the transmission is going out and needing replaying.
2003 Cadillac DeVille150,000
03 Deville new battery no power anywhere at all car is dead to the key turn need help its in good shape hate to lose it but not trying to spend crazy money can't pull code car is completely dead help please
2003 Cadillac DeVille142,292
It stalled on me one day, then next it worked fine. Took the aircleaner box and filter out, tapped on the pcm and it sarted to shoot all kinds of error messages to my dash. Still trying to fix it.
I was having the same issue with my pcm and I send it to be reprogrammed thru an online store
idel rough shifting slow
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