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Fuel System & Fault Isolation Expand All (for easy ctrl-f) Collapse All General Fuel System Monitoring On-Vehicle Service Components Diagnosis Troubleshooting DTC Troubleshooting DTC P0030: Ho2S Heater Control Circuit (Bank 1, Sensor 1) DTC P0031: Ho2S Heater Circuit Low (Bank 1, Sensor 1) DTC P0032: Ho2S Heater Circuit High (Bank 1, Sensor 1) DTC P0036: Ho2S Heater Control Circuit (Bank 1, Sensor 2) DTC P0037: Ho2S Heater Circuit Low (Bank 1, Sensor 2) DTC P0038: Ho2S Heater Circuit High (Bank 1, Sensor 2) DTC P0101: Mass Or Volume Air Flow Circuit Range Performance Problem DTC P0102: Mass Or Volume Air Flow Circuit Low Input DTC P0103: Mass Or Volume Air Flow Circuit High Input DTC P0112: Intake Air Temperature Circuit Low Input DTC P0113: Intake Air Temperature Circuit High Input DTC P0116: Engine Coolant Temperature Sensor Circuit Range Performance Problem DTC P0117: Engine Coolant Temperature Circuit Low Input DTC P0118: Engine Coolant Temperature Circuit High Input DTC P0121: Throttle Position Sensor Circuit Range Performance Problem DTC P0122: Throttle Position Sensor Circuit Low Input DTC P0123: Throttle Position Sensor Circuit High Input DTC P0125: Insufficient Coolant Temperature For Closed Loop Fuel Control DTC P0128: Coolant Thermostat (Coolant Temp. Below Thermostat Regulating Temp.) DTC P0130: Ho2S Circuit Malfunction (Bank 1, Sensor 1) DTC P0131: Ho2S Circuit Low Input (Bank 1, Sensor 1) DTC P0132: Ho2S Circuit High Input (Bank 1, Sensor 1) DTC P0133: Ho2S Circuit Slow Response (Bank 1, Sensor 1) DTC P0134: Ho2S Circuit No Activity Detected (Bank 1, Sensor 1) DTC P0136: Ho2S Circuit Malfunction (Bank 1, Sensor 2) DTC P0137: Ho2S Circuit Low Input (Bank 1, Sensor 2) DTC P0138: Ho2S Circuit High Input (Bank 1, Sensor 2) DTC P0139: Ho2S Circuit Slow Response (Bank 1, Sensor 2) DTC P0140: Ho2S Circuit No Activity Detected (Bank 1, Sensor 2) DTC P0171: Fuel System Too Lean (Bank 1) DTC P0172: Fuel System Too Rich (Bank 1) DTC P0230: Fuel Pump Circuit Malfunction DTC P0261: Cylinder 1 - Injector Circuit Low DTC P0262: Cylinder 1 - Injector Circuit High DTC P0264: Cylinder 2 - Injector Circuit Low DTC P0265: Cylinder 2 - Injector Circuit High DTC P0267: Cylinder 3 - Injector Circuit Low DTC P0268: Cylinder 3 - Injector Circuit High DTC P0270: Cylinder 4 - Injector Circuit Low DTC P0271: Cylinder 4 - Injector Circuit High DTC P0300: Random Multiple Cylinder Misfire Detected DTC P0301: Cylinder 1 - Misfire Detected DTC P0302: Cylinder 2 - Misfire Detected DTC P0303: Cylinder 3 - Misfire Detected DTC P0304: Cylinder 4 - Misfire Detected DTC P0325: Knock Sensor Circuit Malfunction (Bank 1) DTC P0335: Crankshaft Position Sensor Circuit Malfunction DTC P0340: Camshaft Position Sensor Circuit Malfunction DTC P0420: Catalyst System Efficiency Below Threshold (Bank 1) DTC P0441: EVAP. Emission System Incorrect Purge Flow DTC P0442: EVAP. Emission System - Leak Detected (Small Leak) DTC P0444: EVAP. Emission System - Purge CTRL. Valve Circuit Open DTC P0445: EVAP. Emission System - Purge CTRL. Valve Circuit Shorted DTC P0447: EVAP. Emission System - Vent Control Circuit Open DTC P0448: EVAP. Emission System - Vent Control Circuit Shorted DTC P0451: EVAP. Emission System - Pressure Sensor Range Performance DTC P0452: EVAP. Emission System - Pressure Sensor Low Input DTC P0453: EVAP. Emission System - Pressure Sensor High Input DTC P0454: EVAP. Emission System - Pressure Sensor Intermittent DTC P0455: EVAP. Emission System - Leak Detected (Large Leak) DTC P0456: EVAP. Emission System - Leak Detected (Very Small Leak) DTC P0501: Vehicle Speed Sensor Range Performance DTC P0506: Idle Control System - Rpm Lower Than Expected DTC P0507: Idle Control System - Rpm Higher Than Expected DTC P0560: System Voltage Malfunction DTC P0562: System Voltage Low DTC P0563: System Voltage High DTC P0605: Internal Control Module ROM Error DTC P0650: Mil Circuit Malfunction DTC P1166: Ho2S System - Lambda Controller At The Limit (Bank 1) DTC P1505: Idle Charge Actuator Signal Low Of Coil #1 DTC P1506: Idle Charge Actuator Signal High Of Coil #1 DTC P1507: Idle Charge Actuator Signal Low Of Coil #2 DTC P1508: Idle Charge Actuator Signal High Of Coil #2 DTC P1529: TCU Request For Mil On DTC P1586: At/Mt Encoding Error DTC P1693: Mil Request Circuit Malfunction Fuel Delivery System