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Engine Control System Self Diagnostics - V6 Expand All (for easy ctrl-f) Collapse All Introduction Self-Diagnostic System Scan Tool Problems Summary Diagnostic Trouble Code Definitions Diagnostic Tests Notes DTC P0031: Oxygen (A/F) Sensor Heater Control Circuit Low (Bank 1 Sensor 1) Or DTC P0032: Oxygen (A/F) Sensor Heater Control Circuit High (Bank 1 Sensor 1) DTC P0037: Oxygen Sensor Heater Control Circuit Low (Bank 1 Sensor 2) Or DTC P0038: Oxygen Sensor Heater Control Circuit High (Bank 1 Sensor 2) DTC P0100, DTC P0102 & DTC P0103 DTC P0101: Mass Airflow Meter Circuit Range/Performance DTC P0110, DTC P0112 & DTC P0113 DTC P0115, DTC P0117 & DTC P0118 DTC P0116: Engine Coolant Temperature Sensor Circuit Range/Performance Problem Or DTC P0125: Insufficient Coolant Temperature For Closed Loop Fuel Control DTC P0120, DTC P0122, DTC P0123, DTC P0220, DTC P0222, DTC P0223 & DTC P2135 DTC P0121: Throttle Position Sensor Circuit Range/Performance DTC P0128: Thermostat Malfunction DTC P0134: Oxygen (A/F) Sensor Circuit No Activity Detected (Bank 1 Sensor 1) DTC P0136: Oxygen Sensor Malfunction (Bank 1 Sensor 2) DTC P0171: System Too Lean Or DTC P0172: System Too Rich DTC P0300, DTC P0301, DTC P0302, DTC P0303, DTC P0304, DTC P0305 &/Or DTC P0306 DTC P0325, DTC P0327, DTC P0328, DTC P0330, DTC P0332 & DTC P0333 DTC P0335: Crankshaft Position Sensor "A" Circuit Or DTC P0339: Crankshaft Position Sensor "A" Circuit Intermittent DTC P0340: Camshaft Position Sensor "A" Circuit (Bank 1 Or Single Sensor) Or DTC P0341: Camshaft Position Sensor "A" Circuit (Single Sensor) DTC P0351: Ignition Coil "A" Primary/Secondary Circuit DTC P0420: Catalyst System Efficiency Below Threshold DTC P0441, DTC P0442, DTC P0446 & DTC P0456 DTC P0451, DTC P0452 Or DTC P0453 DTC P0500: Vehicle Speed Sensor "A" Circuit DTC P0560: Engine Control Module Batt Circuit DTC P0571: Brake Switch "A" Circuit DTC P0604, DTC P0606, DTC P0607 & DTC P0657 DTC P0617: Starter Relay Circuit High DTC P0724: Brake Switch "B" Circuit High DTC P1126: Magnetic Clutch Circuit DTC P2102: Throttle Actuator Control Motor Circuit Low Or DTC P2103: Throttle Actuator Control Motor Circuit High DTC P2111: Throttle Actuator Control System Stuck Open Or DTC P2112: Throttle Actuator Control System Stuck Closed DTC P2118: Throttle Actuator Control Motor Current Range/Performance DTC P2119: Throttle Actuator Control Throttle Body Range/Performance DTC P2120, DTC P2122, DTC P2123, DTC P2125, DTC P2127, DTC P2128 & DTC P2138 DTC P2121: Throttle Pedal Position Sensor/Switch "D" Circuit Range/Performance DTC P2195, DTC P2196, DTC P2237, DTC P2238 &/Or DTC P2239 DTC P2A00: A/F Sensor Circuit Slow Response (Bank 1 Sensor 1)