P1130 – Air/Fuel Ratio Sensor Circuit
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Symptoms
- Rough idle
- Hesitation
- Poor acceleration
- High fuel trims
- Check engine light
Causes
- Faulty AFR sensor
- Wiring issue
- Connector problem
- Exhaust leak
- ECU issue
Diagnosis
- Inspect AFR wiring
- Test sensor voltage
- Inspect connectors
- Check exhaust leaks
- Scan live data
Repair
- Replace AFR sensor
- Repair wiring
- Fix connectors
- Fix exhaust leaks
- Update ECU