Engine-Codes.com
Engine-Codes – GMC – P2066 2018 GMC Sierra

P2066 2018 GMC Sierra Code - Fuel Level Sensor 2 Performance

Quick Answer

The P2066 diagnostic trouble code (DTC) for a 2018 GMC Sierra relates to the Fuel Level Sensor 2 performance. Common causes include Faulty fuel level sensor, Wiring or connector issues, ECM malfunction. 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 2018 GMC Sierra indicates Fuel Level Sensor 2 Performance.
Common causes
Common causes include Faulty fuel level sensor, Wiring or connector issues, ECM malfunction.
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 08, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P2066 2018 GMC Sierra Description

The P2066 diagnostic trouble code (DTC) for a 2018 GMC Sierra relates to the Fuel Level Sensor 2 performance. This code indicates that there is a problem with the fuel level sensor in the vehicle, specifically the second sensor. 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 information to calculate fuel consumption and adjust performance accordingly.

OBDII Code P2066 2018 GMC Sierra - Fuel Level Sensor 2 Performance
P2066 2018 GMC Sierra Code - Fuel Level Sensor 2 Performance

Common Causes of P2066 2018 GMC Sierra

  1. Faulty fuel level sensor
  2. Wiring or connector issues
  3. ECM malfunction
  4. Fuel tank contamination
  5. Fuel pump failure

Symptoms of P2066 2018 GMC Sierra

  1. Inaccurate fuel gauge readings
  2. Difficulty starting the vehicle
  3. Poor fuel efficiency
  4. Engine stalling while driving

How to Fix P2066 2018 GMC Sierra

  1. Diagnose the specific cause of the issue using a diagnostic scanner to read the DTC and pinpoint the problem.
  2. Inspect the fuel level sensor, wiring, and connectors for any signs of damage or corrosion.
  3. Replace the faulty fuel level sensor if necessary, ensuring it is compatible with the vehicle's make and model.
  4. Clear the DTC and reset the ECM to ensure the repair has been successful.
  5. Test drive the vehicle to confirm that the issue has been resolved and that the fuel gauge readings are accurate.

Cost to Fix P2066 2018 GMC Sierra

The typical repair costs for addressing a Fuel Level Sensor 2 performance issue can range from $200 to $500, including parts and labor. It is important to note that the 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. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It is advisable to check local rates for a more precise estimate.

What does this mean?

Tech Notes for P2066 2018 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.

Need more information about the P2066 2018 GMC Sierra code?

Need more information on how to fix the P2066 2018 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2066 2018 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 2018 GMC Sierra Code

1. What are the common symptoms of OBDII code P2066 in a 2018 GMC Sierra related to Fuel Level Sensor 2 Performance?

- Common symptoms include inaccurate fuel level readings on the dashboard, fluctuating fuel gauge, and potential illumination of the check engine light.

2. What can cause OBDII code P2066 in a 2018 GMC Sierra related to Fuel Level Sensor 2 Performance?

- The code P2066 can be triggered by issues such as a faulty fuel level sensor, wiring problems, poor electrical connections, or a malfunctioning fuel pump module.

3. How can I diagnose the cause of OBDII code P2066 in my 2018 GMC Sierra?

- Diagnosis typically involves checking the fuel level sensor and its wiring for any visible damages, testing the sensor's resistance, and inspecting the fuel pump module for proper functionality.

4. Is it safe to continue driving with OBDII code P2066 in a 2018 GMC Sierra related to Fuel Level Sensor 2 Performance?

- While the vehicle may still be operational, it is recommended to address the issue promptly to avoid running out of fuel unexpectedly or causing potential damage to the fuel system.

5. Can I repair OBDII code P2066 in a 2018 GMC Sierra related to Fuel Level Sensor 2 Performance myself?

- Depending on your skill level, you may be able to address this issue by replacing the fuel level sensor, repairing wiring connections, or fixing any related issues. However, professional diagnosis and repair are recommended for more complex cases.

6. What are the potential repair options for OBDII code P2066 in a 2018 GMC Sierra related to Fuel Level Sensor 2 Performance?

- Repair options may include replacing the faulty fuel level sensor, repairing damaged wiring, ensuring proper electrical connections, or addressing issues with the fuel pump module.

7. How much does it typically cost to repair OBDII code P2066 in a 2018 GMC Sierra related to Fuel Level Sensor 2 Performance?

- Repair costs can vary depending on the exact cause of the issue, the cost of parts, and labor charges. It is advisable to obtain quotes from reputable mechanics or dealerships.

8. Are there any preventive measures to avoid triggering OBDII code P2066 in a 2018 GMC Sierra related to Fuel Level Sensor 2 Performance?

- Regular maintenance, such as checking the fuel system components during scheduled services, can help prevent issues that may lead to the triggering of this code.

9. Can weather conditions or rough driving affect the triggering of OBDII code P2066 in a 2018 GMC Sierra related to Fuel Level Sensor 2 Performance?

- Extreme weather conditions or rough driving may not directly trigger this code, but they can potentially exacerbate existing issues with the fuel level sensor or related components.

10. Does OBDII code P2066 in a 2018 GMC Sierra related to Fuel Level Sensor 2 Performance affect vehicle performance?

- While the code itself may not directly impact performance, addressing the underlying issue promptly is important to ensure accurate fuel level readings and proper functioning of the fuel system.

Discuss the causes and fixes for P2066 2018 GMC Sierra OBDII Code

Submit a New Comment

Code P2066 2018 GMC Sierra comments

No comments found for this page.