P0102 – MAF Sensor Circuit Low Input
Description
The ECM detects a low input signal from the mass airflow (MAF) sensor.
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Compare Diagnostic ScannersSymptoms
- Rough idle
- Hesitation
- Poor acceleration
- Poor fuel economy
Causes
- Dirty or contaminated MAF sensor
- Vacuum leak
- Intake air leak
- Wiring or connector issues
Diagnosis
- Inspect intake ducting and air filter
- Check for vacuum and intake leaks
- Monitor MAF g/s vs RPM
- Backprobe MAF signal and reference voltage
Repair
- Clean or replace MAF sensor
- Repair intake or vacuum leaks
- Repair or replace damaged wiring or connector
