Possible causes – Faulty Throttle Control Motor– Throttle Control Motor harness is open or shorted– Throttle Control Motor circuit poor electrical connection When is the code detected? Engine Control Module (ECM) detects short both circuits between ECM and throttle control

Possible causes – Faulty Throttle Control Motor– Throttle Control Motor harness is open or shorted– Throttle Control Motor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1125 LEXUS Description Throttle motor is operated

Possible causes – Faulty Vacuum Pump Module– Vacuum Pump Module harness is open or shorted– Vacuum Pump Module circuit poor electrical connection.– Faulty Engine Control Module (ECM) When is the code detected? To determine leak criterion (Reference pressure), vacuum pump

Possible causes – Faulty Vacuum Pump Module– Vacuum Pump Module harness is open or shorted– Vacuum Pump Module circuit poor electrical connection.– Faulty Engine Control Module (ECM) When is the code detected? To determine leak criterion (Reference pressure), vacuum pump

Possible causes – Faulty Vacuum Switching Valve (VSV)– Vacuum Switching Valve (VSV) harness is open or shorted– Vacuum Switching Valve (VSV) circuit poor electrical connection– Faulty Pressure Sensor– Faulty Air Switching Valve When is the code detected? If the Engine

Possible causes – Faulty Vacuum Switching Valve (VSV)– Vacuum Switching Valve (VSV) harness is open or shorted– Vacuum Switching Valve (VSV) circuit poor electrical connection– Faulty Pressure Sensor– Faulty Air Switching Valve When is the code detected? If the Engine

Possible causes – Faulty Vacuum Switching Valve (VSV)– VSV for air injection control circuit Bank 1– Air switching valve No.2 Bank 1– VSV for air injection system Bank 1– Engine Control Module (ECM) Symptoms – Engine Light ON (or Service

Possible causes – Faulty Vacuum Switching Valve (VSV)– VSV for air injection control circuit Bank 1– Air switching valve No.2 Bank 1– VSV for air injection system Bank 1– Engine Control Module (ECM) Symptoms – Engine Light ON (or Service

Possible causes – Faulty Vacuum Switching Valve (VSV)– VSV for air injection control circuit Bank 2– Air switching valve No.2 Bank 2– VSV for air injection system Bank 2– Engine Control Module (ECM) Symptoms – Engine Light ON (or Service

Possible causes – Faulty Vacuum Switching Valve (VSV)– VSV for air injection control circuit Bank 2– Air switching valve No.2 Bank 2– VSV for air injection system Bank 2– Engine Control Module (ECM) Symptoms – Engine Light ON (or Service

Possible causes – Ignition Coil No. 1 harness is open or shorted– Ignition Coil No. 1 circuit poor electrical connection– Faulty Ignition Coil No. 1– Faulty Engine Control Module (ECM) When is the code detected? The P1300 code is for

Possible causes – Ignition Coil No. 2 harness is open or shorted– Ignition Coil No. 2 circuit poor electrical connection– Faulty Ignition Coil No. 2– Faulty Engine Control Module (ECM) When is the code detected? The P1305 code is for

Possible causes – Ignition Coil No. 4 harness is open or shorted– Ignition Coil No. 4 circuit poor electrical connection– Faulty Ignition Coil No. 4– Faulty Engine Control Module (ECM) When is the code detected? The P1315 code is for

Possible causes – Ignition Coil No. 3 harness is open or shorted– Ignition Coil No. 3 circuit poor electrical connection– Faulty Ignition Coil No. 3– Faulty Engine Control Module (ECM) When is the code detected? The P1310 code is for

Possible causes – Ignition Coil No. 6 harness is open or shorted– Ignition Coil No. 6 circuit poor electrical connection– Faulty Ignition Coil No. 6– Faulty Engine Control Module (ECM) When is the code detected? The P1325 code is for

Possible causes – Ignition Coil No. 5 harness is open or shorted– Ignition Coil No. 5 circuit poor electrical connection– Faulty Ignition Coil No. 5– Faulty Engine Control Module (ECM) When is the code detected? The P1320 code is for

Possible causes – Rear Air/Fuel Ratio Sensor Bank 1 Sensor 1 harness is open or shorted– Rear Air/Fuel Ratio Sensor Bank 1 Sensor 1 circuit poor electrical connection– Faulty Rear Air/Fuel Ratio Sensor Bank 1 Sensor 1 Symptoms – Engine

Possible causes – Short in Air Pump circuit– Air pump assembly– Faulty Pressure Sensor– Pressure Sensor harness is open or shorted– Pressure Sensor circuit poor electrical connection When is the code detected? If the pressure level from the sensor has

Possible causes – Skid Control ECU / Engine Control Module (ECM) harness is open or shorted– Skid Control ECU / Engine Control Module (ECM) circuit poor electrical connection– Faulty Skid Control ECU– Faulty Engine Control Module (ECM) Symptoms – Engine

Possible causes – Skid Control ECU / Engine Control Module (ECM) harness is open or shorted– Skid Control ECU / Engine Control Module (ECM) circuit poor electrical connection– Faulty Skid Control ECU– Faulty Engine Control Module (ECM) Symptoms – Engine