Faulty fuel level sensor 'B' (sending unit) due to wear or contamination; Wiring damage such as a short to ground or open circuit in the sensor signal circuit; Corroded or loose electrical connector at the fuel tank or sensor; Failed fuel pump module assembly that houses the sensor; ECM internal fault or software issue misinterpreting the signal; Debris or mechanical binding in the fuel tank affecting the float arm

DTC codes / P20xx · Fuel and air metering and auxiliary emission controls / P2067

P2067Fuel Level Sensor 'B' Circuit Low

Q: What does code P2067 mean?

Fuel Level Sensor 'B' Circuit Low. P2067 means the engine control module (ECM) has detected a low voltage signal on the circuit for fuel level sensor 'B', which is typically the secondary fuel level sensor in a dual-tank or saddle-tank system. The ECM expects a voltage within a specific range that corresponds to the fuel level, and a sustained low reading indicates a short to ground, an open circuit, or a faulty sensor.

P2067 means the engine control module (ECM) has detected a low voltage signal on the circuit for fuel level sensor 'B', which is typically the secondary fuel level sensor in a dual-tank or saddle-tank system. The ECM expects a voltage within a specific range that corresponds to the fuel level, and a sustained low reading indicates a short to ground, an open circuit, or a faulty sensor.

SystemPowertrain

Code typeGeneric (all makes)

SeverityLow

Fix difficultyIntermediate

AreaFuel and air metering and auxiliary emission controls

Symptoms you may notice

Illuminated check engine light, often with no other noticeable symptoms
Fuel gauge reading incorrectly, usually showing empty or fluctuating
Low fuel warning light illuminating even when the tank is full
Erratic fuel gauge behavior when driving over bumps or turning
Remote start or fuel pump priming issues on some vehicles
Reduced engine performance or stalling if the ECM uses fuel level for calculations

Common causes, most likely first

Faulty fuel level sensor 'B' (sending unit) due to wear or contamination
Wiring damage such as a short to ground or open circuit in the sensor signal circuit
Corroded or loose electrical connector at the fuel tank or sensor
Failed fuel pump module assembly that houses the sensor
ECM internal fault or software issue misinterpreting the signal
Debris or mechanical binding in the fuel tank affecting the float arm

How to diagnose and fix it

Use an OBD-II scanner to confirm P2067 and check for related codes in other modules
Inspect the fuel level sensor 'B' wiring and connector for damage, corrosion, or looseness
Measure resistance across the sensor and compare to manufacturer specifications
Check the sensor signal voltage at the ECM connector to rule out wiring faults
Test the fuel level sensor 'B' by moving the float arm and observing signal changes
Replace the faulty fuel level sensor or fuel pump module assembly as needed
Clear codes and verify the repair by test-driving and monitoring live data

What the fuel gauge won't tell you

A low voltage code often results from a short to ground in the signal wire, which can be caused by chafed insulation where the harness passes near the fuel tank.
On vehicles with dual fuel tanks, sensor 'B' may be the secondary tank sensor, and a fault can cause incorrect total fuel level calculation even if the primary sensor works.
The ECM may set P2067 if the fuel level sensor signal is low for as little as a few seconds, so intermittent wiring faults can trigger the code without a permanent failure.
Replacing the fuel level sensor without checking the fuel pump module's electrical connector is a common misdiagnosis, as corrosion inside the connector can mimic a failed sensor.
Some vehicles use fuel level data for evaporative emission system tests, so a persistent P2067 can prevent the EVAP monitor from running and cause other codes to set.

Can I keep driving with P2067?

The vehicle is generally safe to drive with P2067 because it does not affect engine operation directly, but you should avoid relying on the fuel gauge and refuel based on mileage until repaired. If the gauge reads empty when full, manually track fuel level to prevent running out of fuel.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.