Possible causes – Engine Control Module (ECM) Harness power supply circuit is open or shorted– Engine Control Module (ECM) Programming– Faulty Engine Control Module (ECM) Tech notes Check the ECM fuse, if fuse is OK try erasing the code first

Possible causes – Engine Control Module (ECM) may be faulty– ECM harness power supply circuit is open or shorted– ECM harness ground circuit is open or shorted Tech notes Check the ECM fuse, if fuse is OK try erasing the

Possible causes – Engine Control Module (ECM) not programed– ECM program– Faulty ECM– Wrong ECM Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P0602 MITSUBISHI Description This diagnostic trouble code (DTC) indicates a programming error within the

Possible causes – Engine Control Module (ECM) Programming error– Odometer not programmed to ECM– Faulty or wrong ECM Tech notes If a new ECM/PCM is installed in a vehicle, the mileage has to be reprogrammed to the new ECM/PCM When

Possible causes – Engine Control Module (ECM) Programming error– Vehicle Identification Number (VIN) not programmed to ECM– Faulty or wrong ECM Tech notes If a new ECM is installed in a vehicle, the Vehicle Identification Number (VIN) has to be

Possible causes – Exhaust Engine Oil Control Valve circuit is open or shorted– Exhaust Engine Oil Control Valve circuit poor electrical connection– Faulty exhaust engine oil control valve– Faulty Engine Control Module (ECM) Symptoms – Engine Light ON (or Service

Possible causes – Exhaust Gas Recirculation (EGR) volume control valve stuck closed– Faulty Exhaust Gas Recirculation (EGR) volume control solenoid valve– Faulty EGR Valve– Faulty EGR temperature sensor and circuit– Exhaust Gas Recirculation (EGR) solenoid valve harness is open or

Possible causes – Faulty Transmission Gear Selection Switch– Transmission Gear Selection Switch harness is open or shorted– Transmission Gear Selection Switch circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

Possible causes – Faulty Air Conditioning Clutch Relay– Air Conditioning Clutch Relay harness is open or shorted– Air Conditioning Clutch Relay circuit poor electrical connection When is the code detected? The P0645 code is stored if an open or short

Possible causes – Faulty ambient air temperature sensor– Ambient air temperature sensor harness is open or shorted– Ambient air temperature sensor circuit poor electrical connection When is the code detected? The Engine Control Module (ECM) has detected an open or

Possible causes – Faulty ambient air temperature sensor– Ambient air temperature sensor harness is open or shorted– Ambient air temperature sensor circuit poor electrical connection When is the code detected? The Engine Control Module (ECM) has detected an open or

Possible causes – Faulty ambient air temperature sensor– Ambient air temperature sensor harness is open or shorted– Ambient air temperature sensor circuit poor electrical connection When is the code detected? The Engine Control Module (ECM) has detected an open or

Possible causes – Faulty Auto Shutdown (ASD) relay– Auto Shutdown (ASD) relay harness is open or shorted– Auto Shutdown (ASD) relay circuit poor electrical connection– Faulty Engine Control Module (ECM) Tech notes Check all the Engine Control Module (ECM) fuses,

Possible causes – Faulty Barometric Pressure (BARO) sensor– Faulty Manifold Absolute Pressure (MAP) sensor– Manifold Absolute Pressure sensor harness open or shorted to ground– Manifold Absolute Pressure sensor circuit poor electrical connection– Faulty Engine Control Module (ECM) When is the

Possible causes – Faulty Battery Temperature Sensor– Battery Temperature Sensor harness is open or shorted– Battery Temperature Sensor circuit poor electrical connection When is the code detected? Battery temperature sensor output value is 0.2 V or less for 0.5 seconds

Possible causes – Faulty Brake Light Switch– Open or short speed control servo circuit– Poor speed control servo electrical connection When is the code detected? Open or shorted condition in the cruise control servo circuit Symptoms – Engine Light ON

Possible causes – Faulty Brake Switch– Brake Switch harness is open or shorted– Brake Switch circuit poor electrical connection When is the code detected? The P0573 codes is set when the stop light switch signal is stuck in the off

Possible causes – Faulty Brake Switch– Misadjusted Brake Switch– Brake Switch harness is open or shorted– Brake Switch circuit poor electrical connection Tech notes Check if the stop light works with the brake pedal, if the brake lights are inoperative,

Possible causes – Faulty Brake Switch– Misadjusted brake switch– Brake Switch harness is open or shorted– Brake Switch circuit poor electrical connection When is the code detected? The P0571 codes is set when the stop light switch does not turn

Possible causes – Faulty Brake Switch– Misadjusted brake switch– Brake Switch harness is open or shorted– Brake Switch circuit poor electrical connection When is the code detected? The P0572 codes is set when the stop light switch is stuck in