P2067: Fuel Level Sensor B Circuit Low

What it means

Fuel-level sensor B reads below lower plausibility — short to ground. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.

How it works

Fuel level sensor B is the secondary sender used on some vehicles to measure a saddle tank or auxiliary tank. The control module monitors the sender's signal circuit. P2067 sets when that signal is lower than expected, which can be caused by a short to ground or a connection fault.

Common causes

Most likely first.

1. Short to ground
2. Connector pins corroded - high contact resistance
3. Harness chafing through insulation

Symptoms

• Check-engine light
• Fuel gauge may read inaccurately or erratically
• Low-fuel warning may not reflect the actual fuel level

How to diagnose it

1. Record freeze-frame data and check for related fuel sender codes to establish whether sensor B's low reading is persistent or intermittent.
2. Compare the fuel gauge and sensor B scan-tool reading with the actual fuel level, if available.
3. Inspect sensor B's connector and harness for chafing, damaged insulation, moisture, corrosion or loose terminals.
4. Use the manufacturer's wiring diagram to test the signal circuit for a short to ground and check connector continuity.
5. If the circuit checks out, test fuel level sensor B for an internal fault using the manufacturer's procedure.

Common fixes

• Repair chafed sensor B wiring that is shorting to ground.
• Clean and secure corroded or loose terminals at the secondary sender.
• Replace a damaged connector or harness section.
• Replace fuel level sensor B if testing confirms its output is faulty.

Can I keep driving?

The vehicle is generally safe to drive, but sensor B may cause an inaccurate gauge or low-fuel warning. Keep a generous reserve and refuel early until the circuit is repaired.