P0102
Mass or Volume Air Flow Circuit Low Input
Description
Mass or Volume Air Flow Circuit Low Input. This powertrain diagnostic trouble code covers the engine, the fuel and ignition systems, emission control and the transmission.
OBD Codes Details
Possible Causes
Faulty sensor, intake leak, clogged fuel filter, weak fuel pump, damaged wiring
Solution
Check for intake leaks, inspect and clean the sensor, measure fuel pressure, compare live data against the expected range
Symptoms
- Engine hesitation or stalling at idle
- Rich running condition and black exhaust smoke
- Poor acceleration
- Rough idle
- Increased fuel consumption
Diagnostic Recommendations
- Inspect MAF sensor wiring and connector for damage
- Check for a disconnected or damaged air intake hose
- Test MAF sensor output voltage at idle and at higher RPM
- Clean the MAF sensor element if contaminated
- Check for unmetered air entering after the MAF sensor
Repair Cost Estimate
- MAF sensor cleaning: $20-50
- MAF sensor replacement: $150-400
- Intake hose repair/replacement: $50-150
- Wiring repair: $80-200
- Total diagnostic and repair: $150-700
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Fact-checking completed
Verified by:
Pavel Volkov
Created:
Information verified against official sources
Official Sources
Society of Automotive Engineers
Official OBD-II diagnostic trouble codes standard (SAE J2012)
Automotive engineering standards organization
International Organization for Standardization
International standard for vehicle diagnostic systems
International standards for automotive diagnostics
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