Possible Cause
P0171
- Intake air leakage
- A/F Sensor 1
- Fuel injector
- Exhaust gas leakage
- Incorrect fuel pressure
- Lack of fuel
- Mass air flow Sensor
- Incorrect PCV hose connection
P0174
- Intake air leakage
- A/F Sensor 1
- Fuel injector
- Exhaust gas leakage
- Incorrect fuel pressure
- Lack of fuel
- Mass air flow Sensor
- Incorrect PCV hose connection