Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer is getting a signal that the fuel level is higher than it should be from one of the sensors in the gas tank.
The P2068 code is triggered when the Powertrain Control Module (PCM) detects a high voltage signal from the fuel level sensor B circuit, indicating an abnormally high fuel level reading.
The fuel level sensor B is responsible for monitoring the amount of fuel in the tank and sending that information to the vehicle's computer. A 'circuit high' condition means that the voltage reading from this sensor is higher than the expected range, which could be due to a wiring issue, a faulty sensor, or a problem with the PCM.
• Inaccurate fuel gauge reading
• Check Engine Light illuminated
• Possible erratic fuel level readings
• Faulty fuel level sensor B
• Wiring issues such as short to voltage
• Faulty PCM
PCM: Powertrain Control Module
OBD-II: On-Board Diagnostics, Second Generation
• Use an OBD-II scanner to verify the code.
• Inspect the wiring and connectors for damage or corrosion.
• Test the fuel level sensor B for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the fuel level sensor B if faulty.
• Reprogram or replace the PCM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $400
Moderate
• Chevrolet Silverado
• GMC Sierra
• Ford F-150
• Regularly inspect and maintain fuel system components.
• Keep the fuel tank clean to prevent sensor issues.
• Check wiring and connectors for corrosion.
Sensor Issue
• Have a professional diagnose the issue to avoid unnecessary repairs.
• Monitor fuel gauge readings to ensure accuracy.
Check with the vehicle manufacturer for warranty coverage on fuel system components.
The P2068 code has been associated with fuel level sensor issues in various vehicle models, particularly affecting trucks with larger fuel tanks.
Moderate – While not critical, addressing this issue can prevent running out of fuel unexpectedly.
Driving with an inaccurate fuel gauge can lead to running out of fuel, which may cause safety hazards.
• Vehicle must be running.
• Fuel level sensor B must be connected and active.
The fuel level sensor B is typically located inside the fuel tank, attached to the fuel pump assembly.
Q: Can I drive with a P2068 code?
A: While you can drive with this code, it's best to fix it soon to avoid running out of fuel unexpectedly.
Q: How do I reset the P2068 code?
A: After repairs, use an OBD-II scanner to clear the code from the PCM.
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