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Check engine light will not stay off, changed converter, regular tune-ups etc.
1999 Cadillac DeVille

Check engine light will not stay off, changed converter, regular tune-ups etc.

(1999 Cadillac DeVille)
have had to reset to pass emission, but comes back on after about 50 miles. drives great no other issues. Only 78,000 miles. What can we do to fix it permanently, without paying thru the nose. Check engine light stays on does not go off.
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Popular Answer
of GT Service Center on March 19, 2014
Have it scanned for the codes then post them here so we can help.
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Check Engine Light Diagnosis
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of GT Service Center on March 19, 2014
Have it scanned for the codes then post them here so we can help.
Sign in to reply

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