Toyota Corolla (E120): Circuit description

Refer to dtc p0130

Dtc no.

Dtc detection condition

Trouble area

P0133 After engine has been warmed up, if response time that heated oxygen sensor’s output voltage reaches from rich to lean.

Or from lean to rich, is 0.6 Second or more during idling.

(2 Trip detection logic)

  • Open or short in heated oxygen sensor (bank 1 sensor 1) circuit
  • heated oxygen sensor (bank 1 sensor 1)
  • heated oxygen sensor heater (bank 1 sensor 1)
  • efi relay
  • Air induction system
  • Fuel pressure
  • injector
  • ecm
If response time of heated oxygen sensor’s output voltage in one rich–lean cycle is 6 seconds or more during idling. (2 Trip detection logic)

Hint

: sensor 1 refers to the sensor closest to the engine assembly.

Monitor description

The engine control module (ecm) uses the heated oxygen sensor information to

The engine control module (ecm) uses the heated oxygen sensor information to regulate the air–fuel ratio close to a stoichiometric ratio. This maximizes the catalytic converter’s ability to purify the exhaust gases.

The sensor detects oxygen levels in the exhaust gas and sends this signal to the ecm.

The inner surface of the sensor element is exposed to the outside air. The outer surface of the sensor element is exposed to the exhaust gas. The sensor element is made of the platinum coated zirconia and includes an integrated heating element. The heated oxygen sensor has the characteristic whereby its output voltage change suddenly in the vicinity of the stoichiometric air–fuel ratio. The heated oxygen sensor generates waveform of a voltage between 0 v and 1 v in response to the oxygen concentration in exhaust gas.

When the output voltage of the heated oxygen sensor is 0.55 V or more, the ecm judges that the air–fuel ratio is rich. When it is 0.40 V or less, the ecm judges that the air–fuel ratio is lean.

The ecm monitors the response feature of the heated oxygen sensor. If the response time of the sensor output status change from rich to lean or vice versa becomes longer, the ecm interprets this as a malfunction in the heated oxygen sensor and sets a dtc.

Monitor strategy

Monitor strategy

Typical enabling condition

Typical enabling condition

Typical malfunction thresholds

Typical malfunction thresholds

Component operating range

Component operating range

Wiring diagram

Wiring diagram

Refer to dtc p0130

    Share this page:

    Other materials:

    Identification information
    Vehicle identification and serial numbers 1. Vehicle identification number The vehicle identification number is stamped on the vehicle identification number plate and certification label, as shown in the illustration. Vehicle identification number plate certification label 2. Engine ...

    Inspection procedure
    1 Inspect stop lamp switch assy 2 Check harness and connector(stop lamp switch assy – ecm)   Install the stop lamp switch assy.  disconnect the ecm connector.  measure the voltage according to the value(s) in the table below when the brake pedal is depressed and rele ...

    If you have a flat tire
    Your vehicle is equipped with a spare tire. The flat tire can be replaced with the spare tire. WARNING ■If you have a flat tire Do not continue driving with a flat tire. Driving even a short distance with a flat tire can damage the tire and the wheel beyond repair, which could result in an acciden ...