1997 Mercury Grand Marquis Q&A

1997 Mercury Grand Marquis Question: My check engine light is OFF. It does not go on at all.

This failure in the OBD system caused it to fail a smog test. Can I get a diagnostic code without paying hundreds of dollars? -
This question hasn't been answered yet.
Answer It or share it on , or Email to get an answer.
Related Items:
new alternator (2-3 mo); new battery (installed today); new serpentine belt; new belt tensioner all changed today...but the battery light is still on (the red warning light on the dashboard). does ...