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My 2000 Deville recently had the "Service Engine Soon" light come on. Never happened on me before now. I have 92,000 miles in the Caddy. I did find the code P0101 was "MAF Sensor Performance". What the heck does that mean and what do I need to do to correct the problem? BTW, I know what the MAF is/does from prior experience on a Lincoln Continental.
 
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