P1216 – Fuel Metering Control Range/Performance
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Symptoms
- Rough idle
- Hesitation
- Poor acceleration
- High fuel trims
- Check engine light
Causes
- Sticking injector
- Fuel pressure issue
- MAF sensor error
- ECU calibration issue
- Vacuum leak
Diagnosis
- Check fuel trims
- Inspect injectors
- Measure fuel pressure
- Check MAF readings
- Smoke test intake
Repair
- Service or replace injectors
- Repair vacuum leaks
- Replace fuel pump
- Clean or replace MAF
- Update ECU software