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Home >> Toyota >> 2003 >> Matrix Base, FWD, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self Diagnostics >> Diagnostic Tests >> DTC P0133: Heated Oxygen Sensor No. 1 Circuit Slow Response >> Circuit Description
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Circuit Description

NOTE:
  • Bank No. 1 refers to bank that includes cylinder No. 1.
  • Sensor No. 1 refers to sensor closer to engine body.
  • The oxygen sensor's output voltage and short-term fuel trim value can be read using hand-held tester or OBD II scan tool.

For circuit description, see DTC P0125: INSUFFICIENT COOLANT TEMPERATURE FOR CLOSED LOOP FUEL CONTROL . Detecting condition of DTC is when response time for oxygen sensor's voltage output to change from rich to lean, or from lean to rich, is 1 second (Corolla and Matrix 1ZZ-FE engine) or 0.8 second (Matrix 2ZZ-GE engine) or more during idling after engine is warmed up (2 trip detection logic).

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