P0036 HO2S Heater Control Circuit (Bank 1 Sensor 2)

Powertrain Severity: Low Generic OBD-II

Fault in the heater control circuit of the downstream oxygen sensor on bank 1.

Common causes

  • Faulty sensor heater
  • Wiring damage
  • Fuse fault

Symptoms

  • Check engine light

What to check

  1. Check fuse
  2. Measure heater resistance
  3. Inspect wiring

Manufacturers may add their own detail to generic codes. If your vehicle shows a different description for P0036, follow the service information for that make and model.

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