Possible causes – Air fuel ratio (A/F) sensor 1 bank 2 harness is open or shorted– Air fuel ratio (A/F) sensor 1 bank 2 circuit poor electrical connection– Faulty Air fuel ratio (A/F) sensor 1 bank 2– Inappropriate fuel pressure–

Possible causes – Dirty Oil– Faulty Exhaust valve timing control solenoid valve– Exhaust valve timing control solenoid valve harness is open or shorted– Exhaust valve timing control solenoid valve circuit poor electrical connection– Faulty Crankshaft position sensor (POS)– Faulty Camshaft

Possible causes – Dirty or low engine oil– Faulty Intake valve timing control solenoid valve– Crankshaft position sensor (POS) may be faulty– Camshaft position sensor– Intake valve timing control solenoid valve harness is open or shorted– Intake valve timing control

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 – 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 valve stuck open– Faulty EGR volume control valve– EGR solenoid valve harness is open or shorted– EGR solenoid valve circuit poor electrical connection– Faulty EGR temperature sensor and circuit When is the code detected?

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 Try erasing the code first, if the light comes back ON

Possible causes -
EVAP canister purge volume control solenoid valve stuck closed– EVAP control system pressure sensor and the circuit
- Loose, disconnected or improper connection of rubber tube-
Blocked rubber tube-
Cracked EVAP canister
- EVAP canister purge volume control solenoid

Possible causes – EVAP control system pressure sensor– Damage harness or connectors to the Purge Control Valve– The valve circuit is open or shorted– EVAP canister purge volume control solenoid valve may be faulty (The valve is stuck open) Tech

Possible causes – Evaporative Emission System (EVAP) Pressure sensor harness is open or shorted – Evaporative Emission System (EVAP) Pressure sensor circuit poor electrical connection – Faulty Evaporative Emission System (EVAP) Pressure sensor When is the code detected? An excessively

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 Air fuel ratio (A/F) sensor 1 bank 1– Air fuel ratio (A/F) sensor 1 bank 1 harness is open or shorted– Air fuel ratio (A/F) sensor 1 bank 1 circuit poor electrical connection– Inappropriate fuel pressure–

Possible causes – Faulty Air fuel ratio (A/F) sensor 1 bank 1– Air fuel ratio (A/F) sensor 1 bank 1 harness is open or shorted– Air fuel ratio (A/F) sensor 1 bank 1 circuit poor electrical connection– Inappropriate fuel pressure–

Possible causes – Faulty Air fuel ratio (A/F) sensor 1 bank 1– Air fuel ratio (A/F) sensor 1 bank 1 harness is open or shorted– Air fuel ratio (A/F) sensor 1 bank 1 circuit poor electrical connection– Inappropriate fuel pressure–

Possible causes – Faulty Air fuel ratio (A/F) sensor 1 bank 2– Air fuel ratio (A/F) sensor 1 bank 2 harness is open or shorted– Air fuel ratio (A/F) sensor 1 bank 2 circuit poor electrical connection– Inappropriate fuel pressure–

Possible causes – Faulty Air fuel ratio (A/F) sensor bank 1 sensor 1– Air fuel ratio (A/F) sensor bank 1 sensor 1 harness is open or shorted– Air fuel ratio (A/F) sensor bank 1 sensor 1 circuit poor electrical connection–

Possible causes – Faulty Air fuel ratio (A/F) sensor bank 2 sensor 1– Air fuel ratio (A/F) sensor bank 2 sensor 1 harness is open or shorted– Air fuel ratio (A/F) sensor bank 2 sensor 1 circuit poor electrical connection–

Possible causes – Faulty Air-Fuel Ratio (A/F) Sensor Bank 1 Sensor 1– Air-Fuel Ratio (A/F) Sensor Bank 1 Sensor 1 harness is open shorted to ground– Air-Fuel Ratio (A/F) Sensor Bank 1 Sensor 1 circuit poor electrical connection– Air-Fuel Ratio