Possible causes – Dirty Fuel Injector 4– Faulty Fuel Injector 4– Plugged Fuel Injector 4– Fuel injector 4 harness is open or shorted– Fuel injector 4 circuit poor electrical connection Tech notes Clogged or partially clogged fuel injector can cause

Possible causes – Dirty Fuel Injector 4– Faulty Fuel Injector 4– Plugged Fuel Injector 4– Fuel injector 4 harness is open or shorted– Fuel injector 4 circuit poor electrical connection Tech notes Clogged or partially clogged fuel injector can cause

Possible causes – Dirty transmission fluid– Low transmission fluid level– Faulty governor pressure solenoid valve– Governor pressure solenoid valve harness or connectors– Governor pressure solenoid valve circuit is open or shorted When is the code detected? Engine Control Module (ECM)

Possible causes – EGR passage clogged– Faulty EGR Vacuum Modulator Valve– Faulty EGR Valve– Faulty EGR solenoid valve– EGR solenoid valve harness is open or shorted– EGR solenoid valve circuit poor electrical connection– Dead (Weak) battery– Faulty EGR temperature sensor

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 – 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) 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 – Engine oil dirty– Incorrect engine viscosity– Crankshaft position sensor circuit is open or shorted– Camshaft position sensor circuit is open or shorted– Faulty crankshaft position sensor– Faulty camshaft position sensor– Timing gear misalign Symptoms – Engine Light

Possible causes – Engine oil dirty– Incorrect engine viscosity– Crankshaft position sensor circuit is open or shorted– Camshaft position sensor circuit is open or shorted– Faulty crankshaft position sensor– Faulty camshaft position sensor– Timing gear misalign Symptoms – Engine Light

Possible causes – EVAP purge solenoid vacuum supply– EVAP purge hose/tube obstruction– EVAP purge solenoid vacuum supply-evap system leak– Faulty Powertrain Control Module (PCM) Tech notes The P0441 code means that the control module has detected a leak in the

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 Switc – 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 Accelerator Pedal Position Sensor– Accelerator Pedal Position Sensor harness is open or shorted– Accelerator Pedal Position Sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P0698 DODGE Description The

Possible causes – Faulty Accelerator Pedal Position Sensor– Accelerator Pedal Position Sensor harness is open or shorted– Accelerator Pedal Position Sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P0699 DODGE Description The

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? Code P0646 may be stored if the commanded signal from

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? Code P0647 may be stored if the commanded signal from

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 Air Pump inoperative– Air bypass solenoid harness is open or shorted– Air bypass solenoid circuit poor electrical connection When is the code detected? The DTC P0412 is detected the the AIR vacuum control solenoid circuit not