Code 37 (Oxygen Sensor Heating)

OXYGEN SENSOR HEATING
Explanation
This trouble code is stored in the case of a break or short at:
- Oxygen sensor (heater pan)
- Sensor heating relay
- Wire from Digital Motor Electronic (DME) control unit to sensor heating relay
- Wires to oxygen sensor
- Output stage in the DME control unit

Troubleshooting
- Perform component activation with tester. The relay is activated at 1 second intervals - this is audible. In the case of defect "connection to sensor signal", check whether the defect is at the sensor or in its supply wire by monitoring the oxygen sensor.
- Proceed with displayed scan tool diagnostic instructions where applicable.