OBD-II Error Code P2066: Fuel Level Sensor B Range – How to Fix It

Q: Can I drive with error code P2066?

Yes, but you may experience an inaccurate fuel gauge or a check engine light. It is generally safe for short trips, but ignoring the code can lead to running out of fuel unexpectedly or poor fuel economy.

Q: What does 'fuel level sensor B' mean?

Many vehicles have multiple fuel level sensors (A and B) for accurate readings, especially in saddle tanks or large tanks. Sensor B is typically the secondary sensor.

Q: How much does it cost to fix P2066?

DIY cost is around $20-$100 for a replacement sensor plus tools. Professional repair can range from $200-$600 depending on labor for tank access and sensor cost.

Q: Will a bad fuel level sensor cause other problems?

Usually no, but it may cause engine misfires or stalling in some models if the sensor data is used for fuel pump control. Check your vehicle's service manual.

Q: Can a loose gas cap cause P2066?

No, a loose gas cap typically triggers EVAP system codes (e.g., P0455). P2066 is specific to the fuel level sensor circuit.

Abstract

Error code P2066 indicates that the engine control module (ECM) has detected a fuel level sensor B signal that is outside the expected range. This usually points to a faulty sensor, wiring issue, or a problem with the fuel level sensor circuit. The fix involves inspecting the sensor and its connections, and replacing the sensor if necessary.