P0101
Mass or Volume Air Flow Circuit Range/Performance Problem
Description
Mass or Volume Air Flow Circuit Range/Performance Problem. 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 running roughly or irregularly
- Poor acceleration or reduced power
- Black smoke from exhaust
- Engine hesitation during acceleration
- Increased fuel consumption
Diagnostic Recommendations
- Use OBD scanner to confirm the code and check for additional codes
- Inspect the Mass Air Flow (MAF) sensor for dirt or damage
- Check air filter condition and replace if dirty
- Examine air intake system for leaks or loose connections
- Test MAF sensor voltage and frequency readings
- Clean MAF sensor with appropriate cleaner if dirty
Repair Cost Estimate
- MAF sensor cleaning: $20-50
- MAF sensor replacement: $150-400
- Air filter replacement: $15-50
- Air intake system repair: $100-300
- Total diagnostic and repair: $200-800
Was this helpful?
Loading...
Send Feedback
Found an error or have a suggestion? We respond within 48 hours.
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
Learn More
Dive deeper with our comprehensive developer guides for OBD Codes
Related Codes
More codes of the same type