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CEL for Barmetric Pressure Drop

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Has anyone seen this before? I didn't get the code, but after two dealer trips the tech found out that the maf sensor had been replaced.

The CEL would come on for about half a day and wouldnt come back for about a month.

I got the car new with ~120 miles because it was brought in from a different dealer and there is no record of it being replaced.

Dealer said they're going to order a maf sensor to replace it.

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