emissions pass/on board diagnostics

Asked by patricktrujillo Oct 18, 2010 at 01:54 AM about the Pontiac Bonneville

Question type: Maintenance & Repair

wont pass emissions- map sensor/mass air flow code on diagnostics.  Cleaned parts, checked vacuum hoses- light still on.  should I replace the map sensor?  will the check engine light reset itself once problem is fixed?

1 Answer

19,025

..should replace it. it tends to fail after awhile. i think mine went out after 18 years.

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