The MAF signal voltage/frequency is too low.
SYMPTOMS
- Check-engine light
- Rough idle
- Hesitation
- Power loss
LIKELY CAUSES
- Dirty or failed MAF
- Wiring open or short
- Intake blockage
- Connector fault
DIAGNOSIS STEPS
- Check MAF wiring and connector
- Inspect the sensor element
- Verify reading at idle
RELATED PARTS
- MAF sensor
- Wiring