Circuit/System Verification
WARNING: This page is about a different variant/trim than selected.
- Ignition ON, observe the DTC information with a scan tool. Verify that other DTCs are not set.
- If any DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Engine idling at normal operating temperatures, observe the scan tool mass airflow (MAF) sensor parameter. The reading should be between 1.5-5.0 g/s.
- If not within the range specified, refer to DTC P0101 .
- Engine running at normal operating temperature, observe the scan tool Long Term FT parameter. The reading should be between -20 to +20 percent.
- If not within the specified range, verify none of the following conditions exist:
- Fuel contamination - Refer to Alcohol/Contaminants-in-Fuel Diagnosis .
- Splits, kinks, or improper connections at the vacuum hoses
- The fuel system operating pressure is incorrect - Refer to Fuel System Diagnosis .
- The fuel injectors are operating lean or rich. Refer to Fuel Injector Solenoid Coil Test - Engine Coolant Temperature Between 10-35 Degrees C (50-95 Degrees F) .
- Missing, restricted, or leaking exhaust components - Refer to Exhaust Leakage .
- Vacuum leaks at the intake manifold, manifold fittings, or throttle body - P0171
- Faulty crankcase ventilation system - Refer to Crankcase Ventilation System Inspection/Diagnosis .
- A collapsed or restricted air intake duct and a restricted or dirty air filter - P0172
- Excessive fuel in the crankcase - P0172
- The incorrect operation of the evaporative emission control system - Refer to Evaporative Emission Control System Diagnosis .
- If not within the specified range, verify none of the following conditions exist:
- If all conditions test normal, test the engine for a mechanical condition. Refer to Symptoms - Engine Mechanical .
- Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.