Question about 2001 Cadillac DeVille

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Engine code P0101 engine runs rough and smells rich

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Code P0101 it means that MAF meter is out of range .no reprogramming the ECM is not gone fix youre problem, the car may have a vacuum leak check the vacuum hoses check you're EGR valve it may be stuck open with carbon also check fuel pressure regulator for fuel leak out of vacuum hose,and if everything is OK change MAF sensor .before that check MAF connector to make sure is not loose or open

Posted on Aug 30, 2010

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You might also check the rubber boot that connects the intake to the upper part of the block where the throttle body attaches. This was a common problem

Posted on Sep 02, 2010

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Hi, engine code P0101 denotes a fault with the Mass Air Flow (MAF). This problem can be fixed by reprogramming the engine control computer at the car dealer's place.
Take care

Posted on Jul 15, 2010

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