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1994 Cadillac DeVille Question: tried to do OBD check. 1. fuel management window did not display codes,2 The inf



Raymond O, Tacoma, WA, December 29, 2012, 16:21

2. the information line did, but it got to pcm part and only displayed PCM?. What does the ? mean? Is the process for checking the OBD different on the digital dash?

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