Possible causes – Faulty Electronic Throttle Control System (ETCS) Actuator– Electronic Throttle Control System (ETCS) Actuator harness is open or shorted– Electronic Throttle Control System (ETCS) Actuator circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon

Possible causes – Faulty Electronic Throttle Control System (ETCS) Actuator– Electronic Throttle Control System (ETCS) Actuator harness is open or shorted– Electronic Throttle Control System (ETCS) Actuator circuit poor electrical connection When is the code detected? The P1129 code is

Possible causes – Faulty Engine Control Module (ECM) Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1100 LEXUS Description Barometric (BARO) Pressure Sensor

Possible causes – Faulty Engine Coolant Temperature (ECT) sensor for HST– Low engine coolant level– Engine Coolant Temperature (ECT) sensor for HST harness is open or shorted– Engine Coolant Temperature (ECT) sensor for HST electrical circuit poor connection– Faulty engine

Possible causes – Faulty Engine Coolant Temperature (ECT) sensor for HST– Low engine coolant level– Engine Coolant Temperature (ECT) sensor for HST harness is open or shorted– Engine Coolant Temperature (ECT) sensor for HST electrical circuit poor connection– Faulty engine

Possible causes – Faulty Engine Coolant Temperature (ECT) sensor for HST– Low engine coolant level– Engine Coolant Temperature (ECT) sensor for HST harness is open or shorted– Engine Coolant Temperature (ECT) sensor for HST electrical circuit poor connection– Faulty engine

Possible causes – Faulty Engine Coolant Temperature (ECT) sensor for HST– Low engine coolant level– Engine Coolant Temperature (ECT) sensor for HST harness is open or shorted– Engine Coolant Temperature (ECT) sensor for HST electrical circuit poor connection– Faulty engine

Possible causes – Faulty Exhaust Gas Temperature Sensor– Exhaust Gas Temperature Sensor harness is open or shorted– Exhaust Gas Temperature Sensor circuit poor electrical connection– Hydro-Carbon Absorber and Catalyst (HCAC) valve stuck or actuator problem Symptoms – Engine Light ON

Possible causes – Faulty Exhaust Gas Temperature Sensor– Exhaust Gas Temperature Sensor harness is open or shorted– Exhaust Gas Temperature Sensor circuit poor electrical connection– Hydro-Carbon Absorber and Catalyst (HCAC) valve stuck or actuator problem Symptoms – Engine Light ON

Possible causes – Faulty Exhaust Gas Temperature Sensor– Exhaust Gas Temperature Sensor harness is open or shorted– Exhaust Gas Temperature Sensor circuit poor electrical connection– Hydro-Carbon Absorber and Catalyst (HCAC) valve stuck or actuator problem Symptoms – Engine Light ON

Possible causes – Faulty Exhaust Gas Temperature Sensor– Exhaust Gas Temperature Sensor harness is open or shorted– Exhaust Gas Temperature Sensor circuit poor electrical connection– Hydro-Carbon Absorber and Catalyst (HCAC) valve stuck or actuator problem Symptoms – Engine Light ON

Possible causes – Faulty Input Speed Sensor– Input Speed Sensor harness is open or shorted– Input Speed Sensor circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light)

Possible causes – Faulty Magnetic Clutch– Magnetic Clutch harness is open or shorted– Magnetic Clutch circuit poor electrical connection Symptoms – Engine Light ON (or Service Engine Soon Warning Light) P1126 LEXUS Description Magnetic clutch is mounted between the throttle

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 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