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DTC P0036: Ho2S Heater Control Circuit (Bank 1, Sensor 2)

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P0036 - HO2S HEATER CONTROL CIRCUIT (BANK 1, SENSOR 2)

Description:  The powertrain control module (PCM) monitors the heater in the heated oxygen sensor (HO2S) for correct operation. The PCM controls the heater on and off duty cycle to maintain a calibrated temperature. The test fails when the sensor does not warm up to the required temperature in a calibrated amount of time. The test also fails when the PCM is not able to maintain the required temperature after the sensor is warm.
Possible Causes: 
  • VPWR circuit open
  • HO2S heater circuit open
  • HO2S heater circuit short in the harness
  • Incorrect connections
  • Damaged or corroded terminals
  • Exhaust temperature significantly higher than expected
  • Damaged HO2S
Diagnostic Aids:  Inspect the connectors for signs of damage, water ingress, or corrosion.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to PINPOINT TEST DW .
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