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P2066 2017 GMC Sierra Code - Fuel Level Sensor 2 Performance

Quick Answer

The P2066 diagnostic trouble code (DTC) for a 2017 GMC Sierra refers to a Fuel Level Sensor 2 Performance issue. Common causes include Faulty fuel level sensor 2, Wiring issues in the sensor circuit, ECM communication problems. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P2066 2017 GMC Sierra indicates Fuel Level Sensor 2 Performance.
Common causes
Common causes include Faulty fuel level sensor 2, Wiring issues in the sensor circuit, ECM communication problems.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 17, 2024
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Code P2066 2017 GMC Sierra Description

The P2066 diagnostic trouble code (DTC) for a 2017 GMC Sierra refers to a Fuel Level Sensor 2 Performance issue. This code indicates that there is a problem with the performance of the fuel level sensor 2 in the vehicle's fuel system. The fuel level sensor is responsible for measuring the amount of fuel in the tank and sending this information to the vehicle's engine control module (ECM). The ECM uses this data to calculate fuel consumption and adjust the fuel mixture accordingly.

OBDII Code P2066 2017 GMC Sierra - Fuel Level Sensor 2 Performance
P2066 2017 GMC Sierra Code - Fuel Level Sensor 2 Performance

Common Causes of P2066 2017 GMC Sierra

  1. Faulty fuel level sensor 2
  2. Wiring issues in the sensor circuit
  3. ECM communication problems
  4. Corrosion or damage to sensor connectors
  5. Fuel system contamination

Symptoms of P2066 2017 GMC Sierra

  1. Inaccurate fuel gauge readings
  2. Poor fuel economy
  3. Engine running lean or rich
  4. Rough idling
  5. Stalling

How to Fix P2066 2017 GMC Sierra

  1. Perform a diagnostic scan to confirm the P2066 code and pinpoint the exact cause of the issue.
  2. Inspect the fuel level sensor 2 and its wiring for any signs of damage or corrosion.
  3. Test the sensor's resistance and output voltage to determine if it is functioning correctly.
  4. Replace the fuel level sensor 2 if it is found to be faulty.
  5. Clear the DTC and perform a test drive to ensure the issue has been resolved.

Cost to Fix P2066 2017 GMC Sierra

The typical repair costs for a Fuel Level Sensor 2 Performance issue can vary depending on the specific cause of the problem and the cost of parts and labor. In general, replacing a faulty fuel level sensor 2 can range from $150 to $300, including parts and labor. However, additional diagnostic time and labor costs may apply, so it's advisable to check with local auto repair shops for a more accurate estimate. Keep in mind that labor rates can vary based on location, vehicle make and model, and engine type.

What does this mean?

Tech Notes for P2066 2017 GMC Sierra

A low fuel level can trigger this code. Before replacing any parts, try filling up the fuel tank and erasing the engine code. If the problem persists, it may be necessary to replace the fuel level sensor.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P2066 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code P2066 on a 2017 GMC Sierra related to Fuel Level Sensor 2 Performance?

The common symptoms include inaccurate fuel gauge readings, fluctuating fuel levels, and the check engine light turning on.

2. What are the possible causes of OBDII code P2066 on a 2017 GMC Sierra?

Possible causes include a faulty fuel level sensor, wiring issues in the fuel level sensor circuit, poor electrical connections, or a problem with the vehicle's powertrain control module (PCM).

3. How can I diagnose the OBDII code P2066 on a 2017 GMC Sierra?

Diagnosing this code involves using an OBDII scanner to retrieve the specific fault code, checking the wiring and connections related to the fuel level sensor, and testing the sensor's functionality.

4. Can I continue driving my 2017 GMC Sierra with OBDII code P2066 triggered?

It is not recommended to drive with this code triggered, as inaccurate fuel level readings can lead to running out of fuel unexpectedly. It is best to address the issue promptly.

5. How can I repair OBDII code P2066 on a 2017 GMC Sierra related to Fuel Level Sensor 2 Performance?

Repair options may include replacing the faulty fuel level sensor, repairing or replacing damaged wiring, ensuring proper electrical connections, or reprogramming the vehicle's PCM.

6. Will resetting the OBDII code P2066 on a 2017 GMC Sierra solve the issue permanently?

Simply resetting the code may temporarily turn off the check engine light, but it will not fix the underlying problem causing the code. Proper diagnosis and repair are necessary for a permanent solution.

7. Is it possible to clear the OBDII code P2066 on a 2017 GMC Sierra without addressing the Fuel Level Sensor 2 Performance issue?

Clearing the code without addressing the root cause may temporarily turn off the check engine light, but the issue will likely reoccur. It's crucial to fix the problem to prevent further issues.

8. Can a DIY enthusiast repair OBDII code P2066 on a 2017 GMC Sierra themselves?

Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to address this code themselves by following repair guides and using proper diagnostic equipment.

9. How long does it typically take to repair OBDII code P2066 on a 2017 GMC Sierra at a professional auto repair shop?

The repair time can vary based on the exact cause of the code, but it may take anywhere from an hour to several hours to diagnose and fix the issue at an auto repair shop.

10. Are there any recalls or technical service bulletins related to OBDII code P2066 on a 2017 GMC Sierra?

It's recommended to check with a GMC dealership or visit the National Highway Traffic Safety Administration (NHTSA) website to see if there are any relevant recalls or technical service bulletins related to this specific OBDII code on your vehicle.

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