P2068 Fault Code

Fuel Level Sensor B Circuit High

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2068 fault code indicates that there is a high voltage condition in the fuel level sensor B circuit. This code is primarily associated with the fuel gauge system and can affect how the fuel level is reported to the vehicle's onboard diagnostics and the driver.

• The fuel level sensor monitors the amount of fuel in the tank.
• Sensor B typically refers to a secondary sensor or the sensor on a secondary fuel tank.
• High voltage may suggest a short circuit or issues with the sensor itself.

What are the symptoms of the P2068 code?

When the P2068 code is present, you may notice:

• Inaccurate fuel gauge reading.
• Warning lights on the dashboard, such as the check engine light.
• Potential stalling or performance issues if the fuel level is misreported.
• Difficulty in estimating the range of the vehicle before refueling.

What causes the P2068 code?

Several factors can lead to the P2068 code being triggered:

• A short circuit in the wiring harness or connectors.
• Faulty fuel level sensor B.
• Corroded connections or damaged wiring.
• Poor grounding in the fuel system circuit.
• Issues with the engine control module (ECM) or body control module (BCM).

How to fix P2068?

To resolve a P2068 fault code, the following steps should be taken:

• Inspect the wiring and connectors related to the fuel level sensor B for any signs of damage or corrosion.
• Test the fuel level sensor for proper operation and replace if faulty.
• Check for short circuits in the wiring harness and repair as necessary.
• Ensure proper grounding in the fuel system circuit.
• Consider updating or reprogramming the ECM or BCM if other diagnostics suggest further issues.