Dirty or contaminated MAF sensor. Air filter restriction. Intake air leak after MAF sensor. Faulty MAF sensor. Damaged MAF wiring.

P0101

Q: Which cars are affected by P0101?

P0101 is most commonly reported on Vauxhall, Volkswagen, BMW, Mercedes-Benz, Renault vehicles, but can appear on any make.

Medium severity

Mass Air Flow Sensor Range/Performance

The mass airflow sensor is reading outside its expected range. This can cause poor fuel economy, rough idle, hesitation on acceleration, and black smoke from the exhaust.

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Common causes of P0101

1Dirty or contaminated MAF sensor

2Air filter restriction

3Intake air leak after MAF sensor

+2 more causes

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Commonly affected vehicles

VauxhallVolkswagenBMWMercedes-BenzRenault

P0101 can appear on any vehicle — these are the makes where it is most frequently reported.

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Most likely cause for your vehicle

Based on your vehicle's make, model, year, and MOT history, the most probable cause is identified and ranked by likelihood.

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Recalls & technical bulletins

Manufacturer recalls and TSBs checked automatically for your specific vehicle, so nothing gets missed.

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Related fault codes

P0171Medium

System Too Lean (Bank 1)

P0300High

Random/Multiple Cylinder Misfire Detected

P0420Medium

Catalyst System Efficiency Below Threshold (Bank 1)

P0172Medium

System Too Rich (Bank 1)