Question about Cadillac DeVille
You need to do is retrieve the codes from the computer; sound like an intermittent fault in the Data Line between the instrument panel cluster and the Heater/ A/C Programmer. Visit some autozone or autoshop witn reader codes to know exactly this code number, or try this procedure:
1. Turn ignition ON with engine OFF.
2. Simultaneously on the climate control panel, push and hold the OFF and WARMER (^) buttons for 3 seconds and release them.
3. You will see codes appearing on the fuel data display in the form of lettersand number followed by the word History or Current and the display will stop and display PCM?.
4. We need to know what letters and numbers appear and if the word History or Current appears with each code that displays.
5. Turn ignition OFF.
Hope helps, keep in touch.
Posted on Apr 01, 2011
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Posted on Jan 02, 2017
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