Powertrain
generic / SAE
P0101
Mass or Volume Air Flow Circuit Range/Performance
The mass air flow (MAF) sensor signal is outside the expected range or does not track engine load plausibly. The ECU compares MAF readings against load calculated from RPM, throttle position and intake pressure; persistent disagreement triggers this code.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number1 / 01
Possible causes
- MAF sensor contaminated (oil, dust) high
- Unmetered air leak after MAF medium
- Air filter heavily clogged medium
- Wiring/connector fault to MAF low
Inspection / repair
- Difficulty: easy
- DIY: possible
- Estimated cost: 50–250 €
- Estimated time: 0.3–1.5 h
- Component: mass air flow sensor
- Component: air filter
- Component: intake duct
- Component: intake manifold
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012
iso:15031-6