Possible causes – Faulty Accelerator Pedal Position (APP) Sensor– Accelerator Pedal Position (APP) Sensor harness is open or shorted– Accelerator Pedal Position (APP) Sensor circuit poor electrical connection– Faulty Engine Control Module (ECM) Symptoms – Engine Light ON (or Service

Possible causes – Faulty Accelerator Pedal Position (APP) Sensor– Accelerator Pedal Position (APP) Sensor harness is open or shorted– Accelerator Pedal Position (APP) Sensor circuit poor electrical connection– Faulty Engine Control Module (ECM) Symptoms – Engine Light ON (or Service

Possible causes – Faulty Accelerator Pedal Position (APP) Sensor– Accelerator Pedal Position (APP) Sensor harness is open or shorted– Accelerator Pedal Position (APP) Sensor circuit poor electrical connection– Faulty Engine Control Module (ECM) Symptoms – Engine Light ON (or Service

Possible causes – Faulty Accelerator Pedal Position (APP) Sensor– Accelerator Pedal Position (APP) Sensor harness is open or shorted– Accelerator Pedal Position (APP) Sensor circuit poor electrical connection– Faulty Engine Control Module (ECM) Symptoms – Engine Light ON (or Service

Possible causes – Faulty Accelerator Pedal Position (APP) Sensor– Accelerator Pedal Position (APP) Sensor harness is open or shorted– Accelerator Pedal Position (APP) Sensor circuit poor electrical connection– Faulty Engine Control Module (ECM) Symptoms – Engine Light ON (or Service

Possible causes – Faulty Accelerator Pedal Position Sensor– Accelerator Pedal Position Sensor harness is open or shorted– Accelerator Pedal Position Sensor circuit poor electrical connection Tech notes For Hybrid Lexus Vehicles P1121 = Coolant Flow Control Valve Position Sensor Circuit

Possible causes – Faulty Accelerator Pedal Position Sensor– Accelerator Pedal Position Sensor harness is open or shorted– Accelerator Pedal Position Sensor circuit poor electrical connection Tech notes For Hybrid Lexus Vehicles P1120 = Coolant Flow Control Valve Position Sensor Circuit.

Possible causes – Faulty Air fuel Ratio (A/F) Bank 1 Sensor 1– Air fuel Ratio (A/F) Bank 1 Sensor 1 harness is open or shorted– Air fuel Ratio (A/F) Bank 1 Sensor 1 circuit poor electrical connection– Fuel pressure– Fuel

Possible causes – Faulty Air fuel Ratio (A/F) Bank 2 Sensor 1– Air fuel Ratio (A/F) Bank 2 Sensor 1 harness is open or shorted– Air fuel Ratio (A/F) Bank 2 Sensor 1 circuit poor electrical connection– Fuel pressure– Fuel

Possible causes – Faulty Air/Fuel Ratio Sensor Bank 1 Sensor 1– Air/Fuel Ratio Sensor Bank 1 Sensor 1 harness is open or shorted– Air/Fuel Ratio Sensor Bank 1 Sensor 1 circuit poor electrical conection Symptoms – Engine Light ON (or

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 – Faulty Engine

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 – Faulty Engine

Possible causes – Faulty Camshaft timing control motor bank 2– Camshaft position sensor harness is open or shorted– Camshaft position sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

Possible causes – Faulty Coolant Flow Control Valve Position Sensor– Coolant Flow Control Valve Position Sensor harness is open or shorted– Coolant Flow Control Valve Position Sensor circuit poor electrical connection Tech notes For Non-Hybrid Lexus Vehicles P1120 = Accelerator

Possible causes – Faulty Coolant Flow Control Valve Position Sensor– Coolant Flow Control Valve Position Sensor harness is open or shorted– Coolant Flow Control Valve Position Sensor circuit poor electrical connection Tech notes For Non-Hybrid Lexus Vehicles P1121 = Accelerator

Possible causes – Faulty Coolant Flow Control Valve Position Sensor– Coolant Flow Control Valve Position Sensor harness is open or shorted– Coolant Flow Control Valve Position Sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon

Possible causes – Faulty Coolant Flow Control Valve Position Sensor– Coolant Flow Control Valve Position Sensor harness is open or shorted– Coolant Flow Control Valve Position Sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon

Possible causes – Faulty electric throttle control actuator (TP sensor 1 and 2)– Throttle Position Sensor harness is open or shorted– Throttle Position Sensor circuit poor connection– Faulty accelerator pedal position sensor Symptoms – Engine Light ON (or Service Engine

Possible causes – Faulty electric throttle control actuator– Throttle plate sticking due to carbon build-up– Electric throttle control actuator harness is open or shorted– Electric throttle control actuator poor electrical circuit connection– Engine Control Module When is the code detected?