Fuel Level Sensor A/B Correlation

Where it lives

For P2C51, start at the sensor the description names.

Check these first

• A fuel level sensor A that disagrees with sensor B
• A sticking float on one fuel level sensor
• Wiring resistance skewing one fuel level signal
• A fuel tank sending unit with a worn contact track

What to do next

1. Read fuel level sensor A and B on a scan tool
2. Compare both sensors through a full tank sweep
3. Test each fuel level signal circuit for added resistance
4. Inspect the tank sending units for a sticking float
5. Replace the faulty fuel level sensor if the readings stay split
6. Clear the code and retest

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