Cadillac STS The newest installation of the performance sedan from Cadillac, having replaced the Seville

94 sts no PCM data

Old 11-21-2009, 01:19 PM
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Default 94 sts no PCM data

I had to pull my battery out to put in my wifes car till I could go to the parts store, when I put my battery back in I got a bunch of problems. First off I got an IO 34 current, and Io 52. I went in the OBD to clear the codes but It says no PCM data, I cleared all the other codes and they are ok now, but I still have the IO 34. the car has defaulted to the limp home mode with snd gear oly and the DIC says Traction disabled. the Temp, MPG & Range all show dashes.

When I shut the car off and restart, then O get the MPG and range displays for about 10 seconds then it flips to the dahes and traction disbled appears on the DIC

I got an PCU form ebay and put it in but I still have the same problems.

Any help would be great.


Old 11-21-2009, 05:00 PM
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Grounds are where you start 90% of the time. Have there been any repairs done besides battery swapping?
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