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P0101 code comes on at start up. Cold or hot engine . Clear it and it stays gone. When code is Present Trans will not shift to OD. Clear it and every thing is great until you restart. Has K&N cold air intake. Cleaned filter. No change. Cleaned MAF with cleaner. No change.
checked wiring - no issues found
any ideas would help. Need new MAF ?

Vehicle: 2004 Chevrolet. 2500HD , 6.0L

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P0101 MAF range / perfromance

Is there any vacuum leak downstream of the MAF sensor? Other than that it the MAF sensor.

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