P0036

Symptoms

• Check Engine Light Illuminates
• Increased fuel consumption
• Unstable engine idling
• Deterioration in acceleration dynamics
• Increased toxicity of exhaust gases
• Possible interruptions in engine operation when warming up

Causes

• Faulty oxygen sensor heating element
• Broken wiring in the heater circuit
• Short circuit in the heater circuit
• Oxidation or corrosion of sensor connector contacts
• Oxygen sensor heater relay malfunction
• Failure of the heater circuit fuse
• Engine control unit (ECU) malfunction

How to Fix

1. Connect a diagnostic scanner and read all error codes
2. Check the oxygen sensor heater circuit fuses and relays.
3. Measure the resistance of the sensor heating element (should be 2-14 Ohms)
4. Check the integrity of the wiring from the ECU to the oxygen sensor
5. Check the supply voltage at the sensor connector (should be 12V)
6. Inspect the sensor connector for corrosion and oxidation
7. If necessary, replace the oxygen sensor
8. Clear error codes and test drive
9. Recheck the system with a diagnostic scanner

Related codes

Error P0036 by Vehicle Brand