P1133 TOYOTA Air/Fuel Ratio Sensor Circuit Response Malfunction Bank 1 Sensor 1

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 Service Engine Soon Warning Light)

P1133 TOYOTA OBD Code Description