P2066 Fault Code

Fuel Level Sensor B Performance

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

The P2066 fault code indicates a performance issue with the Fuel Level Sensor B, which is responsible for measuring the amount of fuel in the fuel tank. This sensor helps the vehicle's engine control unit (ECU) determine how much fuel is available for combustion, ensuring optimal performance and efficiency.

• This code typically points to a malfunction in the sensor's readings, which can lead to incorrect fuel gauge readings.
• The Fuel Level Sensor B is often located in the fuel tank and may be part of a fuel pump assembly or a separate component.

What are the symptoms of the P2066 code?

Drivers might notice several symptoms if the P2066 code occurs, such as:

• Erratic fuel gauge readings, showing incorrect fuel levels.
• Unexpected low fuel warnings or the gauge not moving at all.
• Possible changes in fuel consumption due to incorrect data sent to the ECU.
• Check Engine Light activated on the dashboard.

What causes the P2066 code?

Several factors might trigger the P2066 code, including:

• Faulty fuel level sensor B due to wear or damage.
• Poor electrical connections or damaged wiring associated with the sensor.
• Contaminated fuel, which can affect sensor performance.
• Software issues within the ECU that misinterpret the sensor signals.

How to fix P2066?

To resolve the issues indicated by the P2066 code, the following steps should be taken:

• Inspect the fuel level sensor B for any visible damage or corrosion.
• Test the electrical connections and wiring for continuity and signs of wear.
• Replace the fuel level sensor B if it's found to be faulty or incapable of providing accurate readings.
• Update or reset the vehicle’s ECU software if necessary, especially if software issues are suspected.
• Clear the fault codes and test the vehicle to ensure the issue has been resolved.