P0134 2002 TOYOTA COROLLA - HO2S11 No Circuit Activity Detected 3ZZ-FE Engine
P0134 2002 TOYOTA COROLLA 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 (PCV valve or hoses)
- Exhaust gas leaks
- EFI Relay
P0134 2002 TOYOTA COROLLA Tech Notes
Replacing the Front Heated Oxygen Sensor Bank 1 usually takes care of the problem.
Cost of diagnosing the P0134 2002 TOYOTA COROLLA code
The cost of diagnosing the P0134 2002 TOYOTA COROLLA code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
When is the P0134 2002 TOYOTA COROLLA code detected?
The voltage from the sensor is constantly approx. 0.3V.
P0134 2002 TOYOTA COROLLA Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- High Fuel Consumption
- Excessive Smoke from Exhaust
P0134 2002 TOYOTA COROLLA Meaning
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.