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 Warning

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 Engine Control Module (ECM) Symptoms – Engine Light ON (or Service

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 Tech notes When the a

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) 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 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 harness is open or shorted– Exhaust Gas Recirculation Valve circuit poor electrical connection– Faulty Exhaust Gas Recirculation Valve– Exhaust Gas Recirculation Valve clogged– Exhaust gas leaks Tech notes EGR flow malfunction could be

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 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/Fuel Ration Sensor Relay– Air/Fuel Ration Sensor Relay harness is open or shorted– Air/Fuel Ration Sensor Relay circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

Possible causes – Faulty Brake Switch– Brake Switch harness is open or shorted– Brake Switch circuit poor electrical connection– Misadjusted Brake Switch When is the code detected? The stop light switch does not turn off even once vehicle is driven.

Possible causes – Faulty Camshaft Position Sensor– Camshaft Position Sensor harness is open or shorted– Camshaft Position Sensor circuit poor electrical connection– Faulty starter motor– Starting system circuit– Dead (Weak) battery Tech notes A damaged or stretched cam chain, resulting