Cadillac Repair: Car shuts off after running for 4minutes, cadillac sedan deville, oxygen sensor

Question
Hi Tom , my 1992 Cadillac (Sedan DeVille) shut off after running for 4 minutes , the fan does not come on. Aafter shutting off the check engine light comes on, then the fan comes on. The engine codes diplayed before starting the car are as follows F.32,FF32, 7.0 After the car has been ran and shuts off the codes displayed are E22. All relays,oxygen sensor,temp sensors have been changed,fuel tank removed and cleaned. Please advise. Thank you. Dennis

Answer
What your problem appears to be is a loss of communication between your ECM and BCM computers. There are some diagnostics that you can do if you can read an electrical schematic.

Normally though, BOTH computers need to be replaced.

If you want to do the above said tests, Contact me at:

onlineautohelp@msn.com