Possible causes – Faulty Oxygen Air/Fuel Sensor Bank 1 Sensor 1– Oxygen Air/Fuel Sensor Bank 1 Sensor 1 harness is open or shorted– Oxygen Air/Fuel Sensor Bank 1 Sensor 1 circuit poor electrical connection– Faulty EFI Relay– Faulty Injector– Faulty

Possible causes – Faulty Oxygen Sensor Bank 1 Sensor 2 – Oxygen Sensor Bank 1 Sensor 2 harness is open or shorted– Oxygen Sensor Bank 1 Sensor 2 circuit poor electrical connection– Lean air/fuel ratio-Low fuel pressure, vacuum leak Symptoms

Possible causes – Faulty Park/Neutral Position (PNP) switch– Park/Neutral Position (PNP) switch harness is open or shorted– Park/Neutral Position (PNP) switch circuit poor electrical connection– Misadjusted Park/Neutral Position (PNP) switch Symptoms – Engine Light ON (or Service Engine Soon Warning

Possible causes – Faulty pressure control solenoid valve ‘E’– Pressure control solenoid valve ‘E’ harness is open or shorted– Pressure control solenoid valve ‘E’ circuit poor electrical connection– Faulty Engine Control Module (ECM)– Low transmission fluid level– Dirty transmission fluid

Possible causes – Faulty pressure control solenoid valve ‘E’– Pressure control solenoid valve ‘E’ harness is open or shorted– Pressure control solenoid valve ‘E’ circuit poor electrical connection– Faulty Engine Control Module (ECM)– Low transmission fluid level– Dirty transmission fluid

Possible causes – Faulty Throttle Actuator Control Actuator– Electronic Throttle Control System (ETCS) harness is open or shorted– Electronic Throttle Control System (ETCS) circuit poor electrical connection When is the code detected? The Engine Control Module (ECM) monitors the battery

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 TOYOTA 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) Tech notes There is a factory service bulletin for the following Toyota models:

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) Tech notes There is a factory service bulletin for the following Toyota models:

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. 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. 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. 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. 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