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P2066 2016 GMC Sierra Code - Fuel Level Sensor 2 Performance

Quick Answer

The P2066 diagnostic trouble code for a 2016 GMC Sierra specifically refers to an issue with the Fuel Level Sensor 2 Performance. Common causes include Faulty fuel level sensor, Wiring issues or corrosion, Poor electrical connection. 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 2016 GMC Sierra indicates Fuel Level Sensor 2 Performance.
Common causes
Common causes include Faulty fuel level sensor, Wiring issues or corrosion, Poor electrical connection.
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 15, 2024
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Code P2066 2016 GMC Sierra Description

The P2066 diagnostic trouble code for a 2016 GMC Sierra specifically refers to an issue with the Fuel Level Sensor 2 Performance. This code indicates that there is a problem with the fuel level sensor in the vehicle's fuel tank. The fuel level sensor is responsible for sending information to the vehicle's computer about the amount of fuel in the tank. This information is then used to display the fuel level on the dashboard gauge and to calculate fuel consumption.

OBDII Code P2066 2016 GMC Sierra - Fuel Level Sensor 2 Performance
P2066 2016 GMC Sierra Code - Fuel Level Sensor 2 Performance

Common Causes of P2066 2016 GMC Sierra

  1. Faulty fuel level sensor
  2. Wiring issues or corrosion
  3. Poor electrical connection
  4. Fuel tank contamination
  5. Computer system malfunction

Symptoms of P2066 2016 GMC Sierra

  1. Inaccurate fuel gauge readings
  2. Check Engine Light illuminated
  3. Engine running rough or stalling
  4. Reduced fuel efficiency
  5. Difficulty starting the vehicle

How to Fix P2066 2016 GMC Sierra

  1. Diagnose the issue by using a scan tool to read the code and inspect the fuel level sensor and related components.
  2. Replace the faulty fuel level sensor if it is determined to be the cause of the problem.
  3. Check and repair any wiring or electrical connections that may be damaged or corroded.
  4. Clear the trouble code from the vehicle's computer system and test drive the vehicle to ensure the issue has been resolved.
  5. If the problem persists, further diagnostics may be needed to identify any underlying issues with the fuel system.

Cost to Fix P2066 2016 GMC Sierra

The typical repair costs for a P2066 code related to the Fuel Level Sensor 2 Performance can range from $200 to $500, including parts and labor. However, it is important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Most auto repair shops commonly charge between $80 and $150 per hour, but rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It is recommended to check local rates for a more precise estimate.

What does this mean?

Tech Notes for P2066 2016 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 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code P2066 on a 2016 GMC Sierra related to Fuel Level Sensor 2 Performance?

The common symptoms include inaccurate fuel level readings on the dashboard, fluctuating fuel gauge readings, and the fuel gauge staying at empty even when the tank is full.

2. What are the possible causes of OBDII code P2066 on a 2016 GMC Sierra?

Potential causes of this code include a faulty fuel level sensor, damaged wiring or connectors in the fuel level sensor circuit, or a problem with the vehicle's powertrain control module (PCM).

3. How can I diagnose the issue causing OBDII code P2066 on my 2016 GMC Sierra?

To diagnose the issue, you can use an OBDII scanner to read the code and check the live data for the fuel level sensor. Additionally, inspect the wiring and connectors for any signs of damage or corrosion.

4. Is it safe to continue driving my 2016 GMC Sierra with OBDII code P2066 related to Fuel Level Sensor 2 Performance?

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

5. Can I reset the OBDII code P2066 on my 2016 GMC Sierra by disconnecting the battery?

While disconnecting the battery may clear the code temporarily, it is not a permanent solution. The underlying issue causing the code needs to be diagnosed and repaired to prevent it from recurring.

6. How much does it typically cost to repair OBDII code P2066 on a 2016 GMC Sierra?

The cost of repairing this code can vary depending on the exact cause of the issue. It may involve replacing the fuel level sensor, repairing wiring, or addressing PCM issues. Costs can range from a few hundred to over a thousand dollars.

7. Are there any DIY tips for fixing OBDII code P2066 on a 2016 GMC Sierra?

If you have experience with automotive repairs, you may be able to replace the fuel level sensor yourself. However, diagnosing and repairing wiring or PCM issues may require professional assistance.

8. Can a faulty fuel level sensor cause other issues besides triggering OBDII code P2066 on a 2016 GMC Sierra?

Yes, a faulty fuel level sensor can cause other issues such as incorrect fuel level readings, inaccurate range estimations, and potential stalling if the vehicle runs out of gas unexpectedly.

9. How long does it typically take to repair OBDII code P2066 on a 2016 GMC Sierra?

The repair time can vary depending on the exact cause of the issue and the availability of parts. In general, it may take a few hours to a full day to diagnose and repair the problem.

10. Will OBDII code P2066 on a 2016 GMC Sierra cause the check engine light to illuminate?

Yes, OBDII code P2066 related to Fuel Level Sensor 2 Performance will trigger the check engine light to illuminate on the dashboard of your 2016 GMC Sierra.

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