Possible causes – A/C system low or over charge with refrigerant– Faulty A/C refrigerant pressure sensor– Cooling fans in-operative– A/C refrigerant pressure sensor circuit open or shorted– A/C refrigerant pressure sensor circuit poor electrical connection When is the code detected?

Possible causes – A/C system low or over charge with refrigerant– Faulty A/C refrigerant pressure sensor– Cooling fans in-operative– A/C refrigerant pressure sensor circuit open or shorted– A/C refrigerant pressure sensor circuit poor electrical connection When is the code detected?

Possible causes – Battery defective– Loose or missing alternator drive belt– Faulty alternator– Open or short system voltage circuit Tech notes Higher than expected voltage problems are most likely caused by bad voltage regulator. The voltage regulator is part of

Possible causes – Damaged, missing or loosely installed fuel filler cap Tech notes Check for a loose, missing or damage fuel filler the cap. When is the code detected? EVAP control system has a very large leak such as fuel

Possible causes – Dirty Oil – Low engine oil level– Valve Timing Control (VTC) open or shorted circuit.– Valve Timing Control (VTC) electrical connector– Faulty Valve Timing Control (VTC)– Damaged ECM Symptoms – Engine Light ON (or Service Engine Soon

Possible causes – Dirty Oil– Low engine oil level– Valve Timing Control (VTC) open or shorted circuit.– Valve Timing Control (VTC) electrical connector– Faulty Valve Timing Control (VTC)– Damaged ECM Symptoms – Engine Light ON (or Service Engine Soon Warning

Possible causes – Dirty throttle body– Electric throttle control actuator misadjusted or damaged– Faulty Electric throttle control actuator– Intake air leak– Poor electrical connection to the Intake Air Control (IAC) valve Tech notes If there are no intake leaks, clean

Possible causes – Dirty throttle body– Electric throttle control actuator misadjusted or damaged– Faulty Electric throttle control actuator– Intake air leak– Poor electrical connection to the Intake Air Control (IAC) valve Tech notes If there are no intake leaks, clean

Possible causes – Dirty transmission fluid– Low transmission fluid level– Faulty line pressure solenoid valve ‘A’– Line pressure solenoid valve ‘A’ harness is open or shorted– Line pressure solenoid valve ‘A’ circuit poor electrical connection When is the code detected?

Possible causes – EGR Valve clogged, dirty or leaky– EGR valve damaged/defective– EGR volume control solenoid valve– EGR temperature sensor and circuit– EGR volume control solenoid valve harness is open or shorted– EGR volume control solenoid valve circuit poor electrical

Possible causes – EGR volume control solenoid valve– EGR volume control solenoid valve harness is open or shorted– EGR volume control solenoid valve circuit poor electrical connection– EGR temperature sensor and circuit When is the code detected? An improper voltage

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

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 – Excessive resistance in the circuit– Low or no fuel– Wiring harness connector of the fuel pressure sensor– Fuel Rail Pressure Sensor– Fuel Pump Symptoms – Engine Light ON (or Service Engine Soon Warning Light)– Engine will not

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 – Exhaust Gas Recirculation Valve clogged– Faulty Exhaust Gas Recirculation Valve– Exhaust Gas Recirculation Valve harness is open or shorted– Exhaust Gas Recirculation Valve circuit poor electrical connection– Exhaust gas leaks Tech notes The problem is common on

Possible causes – Exhaust Gas Recirculation Valve clogged– Faulty Exhaust Gas Recirculation Valve– Exhaust Gas Recirculation Valve harness is open or shorted– Exhaust Gas Recirculation Valve circuit poor electrical connection– Exhaust gas leaks Tech notes The problem is common on

Possible causes – Exhaust Gas Recirculation Valve clogged– Faulty Exhaust Gas Recirculation Valve– Exhaust Gas Recirculation Valve harness is open or shorted– Exhaust Gas Recirculation Valve circuit poor electrical connection– Exhaust gas leaks Tech notes The problem is common on

Possible causes – Exhaust Gas Recirculation Valve clogged– Faulty Exhaust Gas Recirculation Valve– Exhaust Gas Recirculation Valve harness is open or shorted– Exhaust Gas Recirculation Valve circuit poor electrical connection– Exhaust gas leaks Tech notes The problem is common on