Engine Oil Quality Sensor Circuit Range/Performance

Where it lives

For P252B, the description names the sensor as the part involved.

Check these first

• A failed engine oil quality sensor
• An oil quality sensor circuit with added resistance
• Water damage at the oil quality sensor
• Degraded oil that reads outside the sensor range

What to do next

1. Read the engine oil quality sensor on a scan tool
2. Compare the oil quality reading to the oil age
3. Test the oil quality sensor circuit for added resistance
4. Inspect the oil quality sensor for water damage
5. Replace the engine oil quality sensor if the reading stays out of range
6. Clear the code and retest

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