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Check engine light stays on after repairs
1999 Cadillac DeVille

Check engine light stays on after repairs

(1999 Cadillac DeVille)
I had two oxygen sensors replaced and a speed sensor and gas cap, however, the check engine soon light is still on. Could it have anything to do with the cruise control as we have replaced fuses on the cruise control twice?
1 answer & 1 comment
Popular Answer
of CarWise Automotive on January 03, 2011
Do you know what the original codes and current codes are?
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P503 was the current code for the light staying on. I have taken it to two Cadillac dealers and neither of them could tell me what was wrong. Do you think you have seen a problem like this before? Now, my A/C won't come on. I am about ready to ditch a really good car except for these problems. Any help you can give me would be appreciated.
Check Engine Light Diagnosis
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of CarWise Automotive on January 03, 2011
Do you know what the original codes and current codes are?
Sign in to reply
P503 was the current code for the light staying on. I have taken it to two Cadillac dealers and neither of them could tell me what was wrong. Do you think you have seen a problem like this before? Now, my A/C won't come on. I am about ready to ditch a really good car except for these problems. Any help you can give me would be appreciated.

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