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How do I troubleshoot P0141 and P0171 obdII fault codes on a 1999 ford contour?
Wiki User
∙ 14y ago
Check out the mass air flow, probably dirty, clean VERY CAREFULLY with electrical contact cleaner or replace it if you feel wealthy. DON"T BREAK THE WIRE, DON"T USE A CLEANER THAT LEAVES A DEPOSIT ON THE WIRE. Both codes together lead to this but more diagnostics would't hurt. Try cleaning it first, a bottle of spray is about $5.00 (cheap starting point).
Wiki User
∙ 14y ago
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Get a can of mass air flow sensor cleaner and clean the maf sensor
