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Home >> Toyota >> 1996 >> Tercel Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Tests W/Codes >> Circuit Tests >> DTC P0136 - Oxygen Sensor Circuit (Sensor No. 2) >> Diagnosis & Repair
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Diagnosis & Repair

  1. If any other codes are displayed other than DTC P0136, diagnose and repair those codes first. If only DTC P0136 is displayed, check for an open or short circuit in wiring harness between heated oxygen sensor and ECM. See appropriate wiring diagram in WIRING DIAGRAMS article. Repair as necessary.
  2. If wiring is okay, connect scan tester. See Figure. Start and warm engine to normal operating temperature. Monitor sensor No. 2 output voltage. Snap accelerate engine 3 times. Voltage should fluctuate from .4-.5 volt or more.
  3. If voltage responds correctly, inspect sensor wiring harness connector. Problem may be intermittent. If voltage does not respond correctly, replace sensor and retest.
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