Possible causes

– Faulty Front Heated Oxygen Sensor Bank 1
– Front Heated Oxygen Sensor Bank 1 harness is open or shorted
– Front Heated Oxygen Sensor Bank 1 circuit poor electrical connection
– Inappropriate fuel pressure
– Faulty fuel injectors
– Intake air leaks may be faulty
– Exhaust gas leaks

Tech notes

Replacing the Front Heated Oxygen Sensor Bank 1 usually takes care of the problem

When is the code detected?

The response of the voltage signal from the sensor takes more than the specified time.

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)
– High Fuel Consumption
– Excessive Smoke from Exhaust

P0133 Description

The front heated oxygen sensor (or O2 sensor 1) is placed into the exhaust manifold. It detects the amount of oxygen in the exhaust gas compared to the outside air. The heated oxygen sensor 1 has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. The heated oxygen sensor 1 signal is sent to the Engine Control Module (ECM). The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the radical change from 1V to 0V.

P0133 Information for specific makes

P0133 SUZUKI
P0133 HONDA
P0133 ACURA
P0133 FORD
P0133 HYUNDAI
P0133 NISSAN-2
P0133 NISSAN
P0133 INFINITI-2
P0133 BUICK
P0133 INFINITI
P0133 TOYOTA
P0133 LEXUS
P0133 SCION
P0133 ISUZU
P0133 KIA
P0133 MITSUBISHI
P0133 MAZDA
P0133 SUBARU
P0133 AUDI
P0133 VOLKSWAGEN
P0133 CHRYSLER
P0133 DODGE
P0133 JEEP
P0133 JAGUAR
P0133 CADILLAC
P0133 CHEVROLET
P0133 GMC
P0133 PONTIAC
P0133 SATURN