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Engine-Codes – GMC – U2616 2016 GMC Sierra

U2616 2016 GMC Sierra Code - Fuel Pump Driver Control Module Lost Communication With ECM

Quick Answer

The U2616 diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates that the Fuel Pump Driver Control Module (FPDM) has lost communication with the Engine Control Module (ECM). Common causes include Wiring harness issues, Faulty connectors between the FPDM and ECM, Malfunctioning FPDM or ECM. 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
U2616 2016 GMC Sierra indicates Fuel Pump Driver Control Module Lost Communication With ECM.
Common causes
Common causes include Wiring harness issues, Faulty connectors between the FPDM and ECM, Malfunctioning FPDM or ECM.
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 16, 2024
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Code U2616 2016 GMC Sierra Description

The U2616 diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates that the Fuel Pump Driver Control Module (FPDM) has lost communication with the Engine Control Module (ECM). The FPDM is responsible for controlling the fuel pump operation, ensuring proper fuel delivery to the engine. When communication between the FPDM and ECM is lost, it can lead to various performance issues and potentially cause the vehicle to stall or not start at all.

OBDII Code U2616 2016 GMC Sierra - Fuel Pump Driver Control Module Lost Communication With ECM
U2616 2016 GMC Sierra Code - Fuel Pump Driver Control Module Lost Communication With ECM

Common Causes of U2616 2016 GMC Sierra

  1. Wiring harness issues
  2. Faulty connectors between the FPDM and ECM
  3. Malfunctioning FPDM or ECM
  4. Software glitches or communication errors
  5. Electrical interference or shorts in the system

Symptoms of U2616 2016 GMC Sierra

  1. Rough idling or engine hesitation
  2. Engine misfires
  3. Difficulty starting the vehicle
  4. Stalling while driving
  5. Decreased fuel efficiency

How to Fix U2616 2016 GMC Sierra

  1. Perform a thorough inspection of the wiring harness and connectors for any signs of damage or corrosion.
  2. Check the FPDM and ECM for proper functionality and communication.
  3. Clear the DTC and reset the system to see if the code reappears.
  4. If the issue persists, replace the faulty FPDM or ECM and reprogram as necessary.
  5. Test drive the vehicle to ensure proper fuel pump operation and communication between modules.

Cost to Fix U2616 2016 GMC Sierra

The typical repair costs for addressing a U2616 code on a 2016 GMC Sierra can range from $200 to $600, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that diagnosis time and labor rates can vary, with rates typically ranging between $80 and $150 per hour. Factors such as location, vehicle make and model, and engine type can also impact the overall repair costs. It is advisable to consult with a trusted auto repair shop for a more accurate estimate based on your specific circumstances.

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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 U2616 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code U2616 in a 2016 GMC Sierra related to the Fuel Pump Driver Control Module lost communication with ECM?

- Common symptoms include issues with starting the vehicle, engine stalling, rough idling, and in some cases, the vehicle may not start at all.

2. What are the possible causes of OBDII code U2616 in a 2016 GMC Sierra?

- The code U2616 can be triggered by a faulty Fuel Pump Driver Control Module, a malfunctioning Engine Control Module (ECM), damaged wiring or connectors, or a communication error between modules.

3. How can I diagnose the cause of OBDII code U2616 in my 2016 GMC Sierra?

- To diagnose the issue, it is recommended to perform a thorough inspection of the wiring and connectors, check the fuel pump driver module functionality, and conduct a scan tool diagnosis to identify the exact cause of the communication error.

4. Can I still drive my 2016 GMC Sierra with the OBDII code U2616 present?

- It is not recommended to drive the vehicle with the U2616 code present, as it can lead to potential issues with engine performance, starting the vehicle, and overall drivability.

5. How do I repair OBDII code U2616 in my 2016 GMC Sierra?

- Repairing the U2616 code involves addressing the root cause of the communication error, which may include repairing or replacing the Fuel Pump Driver Control Module, fixing wiring issues, or addressing ECM malfunctions.

6. Is it possible to reset the OBDII code U2616 in a 2016 GMC Sierra without fixing the underlying issue?

- While you can clear the code using an OBDII scanner, it is essential to address the underlying cause of the code to prevent it from reoccurring and ensure the proper functioning of the vehicle.

7. Can a DIY enthusiast fix OBDII code U2616 in a 2016 GMC Sierra?

- Depending on your technical skills and access to tools, some DIY enthusiasts may be able to address the U2616 code by inspecting wiring, connectors, and replacing components like the Fuel Pump Driver Control Module.

8. How much does it typically cost to repair OBDII code U2616 in a 2016 GMC Sierra?

- The cost of repairing the U2616 code can vary depending on the cause of the issue, the need for replacement parts, and labor costs. It is advisable to consult a mechanic for an accurate estimate.

9. Are there any preventive measures to avoid OBDII code U2616 in a 2016 GMC Sierra?

- Regular maintenance, inspecting wiring harnesses for damage, and addressing any communication issues promptly can help prevent the occurrence of code U2616 in your 2016 GMC Sierra.

10. Will OBDII code U2616 cause my 2016 GMC Sierra to fail an emissions test?

- Yes, the presence of code U2616 can cause your 2016 GMC Sierra to fail an emissions test, as it indicates a communication error related to the fuel system, which can affect emissions control.

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