Possible Cause

NOTE:  The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.

• Fuel pump failure
• Injector failure
• Fuel pressure regulator failure
• Fuel line failure
• Fuel supply system failure
• Mass airflow (MAF) sensor range/performance problem
• Manifold absolute pressure (MAP) sensor range/performance problem
• Rear A/F sensor (bank 1, sensor 1) failure
• Vacuum hose misinstalled
• Throttle body air leak
• Intake manifold air leak
• Evaporative emission (EVAP) canister purge valve failure
• Valve timing incorrect