Fuel Level Sensor "B" Circuit Low
Code P2067 indicates the fuel level sensor B circuit is detecting a low voltage input signal. The PCM has determined that the sensor circuit voltage is below the expected operating range, which prevents accurate fuel gauge reading and fuel system management.
What You Might Notice
- Fuel gauge reads empty or full constantly
- Check engine light illuminated
- Inaccurate fuel economy display
- Incorrect distance to empty reading
- Fuel gauge erratic or unresponsive
Most Common Causes
- 1
Faulty fuel level sensor B
The fuel level sensor B has failed or is providing incorrect resistance values to the PCM. This is the most common cause of low circuit voltage signals.
- 2
Wiring or connector issues
Corroded, loose, or damaged wiring in the fuel level sensor B circuit causes voltage drop and poor signal transmission. Check all connectors and wiring for corrosion or damage.
- 3
Ground connection failure
A poor or broken ground connection in the fuel level sensor circuit prevents proper signal voltage from reaching the PCM. Verify ground connections are clean and secure.
- 4
PCM or module malfunction
Rarely, the powertrain control module itself may have failed or a secondary fuel management module is malfunctioning and incorrectly processing the sensor signal.
How to Diagnose It
- 1
Check Faulty fuel level sensor B — The fuel level sensor B has failed or is providing incorrect resistance values to the PCM. This is the most common cause of low circuit voltage signals.
- 2
Check Wiring or connector issues — Corroded, loose, or damaged wiring in the fuel level sensor B circuit causes voltage drop and poor signal transmission. Check all connectors and wiring for corrosion or damage.
- 3
Check Ground connection failure — A poor or broken ground connection in the fuel level sensor circuit prevents proper signal voltage from reaching the PCM. Verify ground connections are clean and secure.
- 4
Check PCM or module malfunction — Rarely, the powertrain control module itself may have failed or a secondary fuel management module is malfunctioning and incorrectly processing the sensor signal.
How to Fix It
- 1
Replace fuel level sensor B
Remove the fuel tank access panel or drop the tank as needed to access the fuel level sensor B assembly. Disconnect the electrical connector and remove the old sensor, then install a new OEM or quality replacement sensor and reconnect the wiring.
- 2
Inspect and repair wiring and connectors
Trace the fuel level sensor B circuit from the sensor to the PCM. Clean all connectors with electrical contact cleaner, repair any corroded pins, and secure loose connections. Replace any damaged or frayed wiring segments.
- 3
Check and secure ground connections
Locate the ground connection for the fuel level sensor circuit and verify it is clean and tight. Remove any corrosion from the ground point and reconnect, ensuring good metal-to-metal contact.
- 4
Test PCM and verify no module faults
After sensor and wiring repairs, use a diagnostic scanner to verify the P2067 code clears and no secondary faults appear. If code persists after sensor and connector repairs, the PCM or fuel management module may require replacement or reprogramming.
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