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Home >> Jeep >> 2004 >> Wrangler X, Standard >> Repair and Diagnosis >> Electrical >> Starter >> Powertrain Diagnostic Procedures >> DRIVEABILITY - Gas >> DTC P0135: O2 Sensor 1/1 Heater Failure, DTC P0141: O2 Sensor 1/2 Heater Failure, DTC P0155: O2 Sensor 2/1 Heater Failure, DTC P0161: O2 Sensor 2/2 Heater Failure >> Possible Causes
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Possible Causes

  1. GOOD TRIP EQUAL TO ZERO
  2. O2 SENSOR HEATER OPERATION
  3. O2 HEATER ELEMENT
  4. O2 HEATER SUPPLY CIRCUIT OPEN
  5. HEATER CONTROL CIRCUIT OPEN
  6. HEATER CONTROL CIRCUIT SHORTED TO GROUND
  7. PCM
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