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Home >> Toyota >> 1995 >> Tercel Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Diagnostic Testing >> Code P0136 - Heated Oxygen Sensor (Rear Sensor) Circuit >> Diagnosis & Repair
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Diagnosis & Repair

  1. If any other codes are displayed other than Code P0136, diagnose and repair those codes first. If only Code P0136 is displayed, inspect circuits between ECM and sensor for opens or shorts. See wiring diagram in the WIRING DIAGRAMS article. Repair as needed.
  2. If all circuits are okay, connect scan tester. See Figure. Start and warm engine to normal operating temperature. Monitor oxygen sensor output voltage. Snap accelerate engine 3 times. Voltage should fluctuate from .4-.5 volt or more.
  3. If voltage responds correctly, inspect harness connection. Problem may be intermittent. If voltage does NOT respond correctly, replace sensor and retest.
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