Code
P0101
Air intake
Mass airflow sensor range / performance problem
The MAF reading is outside the plausible range for the operating conditions.
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Most likely causes
- Dirty or oiled MAF sensor
- Intake air leak
- Clogged air filter
- Exhaust leak
Symptoms you may notice
- Check engine light
- Poor acceleration
- Higher consumption
Checks to run
- Clean the MAF
- Smoke-test the intake
- Replace the air filter
- Check for exhaust leaks
Tools you may need
MAF cleaner
Smoke machine
Always diagnose before replacing. Codes share symptoms; confirm the cause with measurements before buying parts.