Error code
OBD2 P0036
OBD2P0036
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
HO2S Heater Control Circuit.
Severity
moderateCan drive, but emissions testing may fail.
Summary
Code P0036 indicates a malfunction in the heater control circuit of the heated oxygen sensor (HO2S) 2 on bank 1 of your engine.
Symptoms
- Illuminated check engine light
Common Causes
- Problem on the ground side of the O2 sensor heater circuit
- Problem on the power side of the O2 sensor heater circuit
- High resistance in the O2 sensor heater element
- Open circuit in the O2 sensor heater element
Diagnosis
- Test the heater circuit wiring for power and ground using a digital multimeter.
- Check the resistance of the sensor heating element to determine if it has high resistance or an open circuit.
Fixes
- Replace the faulty oxygen sensor if there is high resistance or an open circuit in the heater element.
FAQ
What should I do if my check engine light comes on with code P0036?
You should test the oxygen sensor's heater circuit for power and ground issues, or replace the faulty oxygen sensor.
Can I drive with this code active?
Yes, you can continue driving but it may cause a failure during emissions testing.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
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