P1103 – MAF Sensor Circuit High Frequency
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Symptoms
- Rough idle
- Hesitation
- Poor acceleration
- High fuel trims
- Check engine light
Causes
- Air leak after MAF
- Faulty MAF sensor
- Contaminated sensor
- Wiring issue
- ECU issue
Diagnosis
- Inspect intake system
- Test MAF frequency
- Check wiring
- Scan live data
- Inspect air filter
Repair
- Fix air leaks
- Clean or replace MAF
- Repair wiring
- Replace air filter
- Update ECU