Oxygen Sensor Reads 0.0 mV
Sensor reads 0.0 mV indicating issue with the cell or a cable
Possible causes:
- Depleted oxygen sensor
- Reversed cable polarity
- Corroded cable or connector
Step-by-step troubleshooting:
- Check the oxygen sensor
- Sensor age - replace if older than 5 years
- In different analyzer or measure sensor directly with multimeter
- Inspect sensor pins/contacts for corrosion, replace sensor if corrosion present
- Check the cable / wiring
- Check the polarity - red wire matches the plus mark on the board
- If there is accessible the cable to board connection, try switching the cable polarity whether that helps
- Confirm wiring continuity
When to contact service: When a new sensor does not solve the issue, and troubleshooting the cable polarity proved no improvement.