AutoCodes – GMC – U2616 2015 GMC Sierra

U2616 2015 GMC Sierra Code - Fuel Pump Driver Control Module Lost Communication With ECM

Quick Answer

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Engine Control Module (ECM), Engine Control Module harness is open or shorted, Engine Control Module circuit 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: U2616 2015 GMC Sierra indicates Fuel Pump Driver Control Module Lost Communication With ECM.
Common causes: Common causes include Faulty Engine Control Module (ECM), Engine Control Module harness is open or shorted, Engine Control Module circuit 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.

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Code Popularity 262

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 24, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U2616 2015 GMC Sierra Description

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the devices. The devices have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver device as an availability indication of the transmitter device. Each message contains the identification number of the transmitter device. The Diagnostic Trouble Code (DTC) will be set when a supervised periodic message that includes the transmitter device availability has not been received.

OBDII Code U2616 2015 GMC Sierra - Fuel Pump Driver Control Module Lost Communication With ECM - AutoCodes.com — U2616 2015 GMC Sierra Code - Fuel Pump Driver Control Module Lost Communication With ECM

What does this mean?

What are the Possible Causes of the DTC U2616 2015 GMC Sierra?

Faulty Engine Control Module (ECM)
Engine Control Module harness is open or shorted
Engine Control Module circuit poor electrical connection
Faulty Fuel Pump Driver Control Module

How to Fix the DTC U2616 2015 GMC Sierra?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U2616 2015 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the U2616 2015 GMC Sierra code?

Need more information on how to fix the U2616 2015 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 2015 GMC Sierra Code

1. What are the common symptoms of OBDII code U2616 in a 2015 GMC Sierra?

The common symptoms include issues with the fuel pump operation, stalling, rough idling, difficulty starting the vehicle, and illuminated warning lights on the dashboard.

2. What causes the OBDII code U2616 in a 2015 GMC Sierra?

This code is typically triggered when there is a communication breakdown between the Fuel Pump Driver Control Module (FDCM) and the Engine Control Module (ECM) in the vehicle.

3. How can I diagnose the U2616 code in my 2015 GMC Sierra?

Diagnosing this code usually involves checking for loose or damaged wiring connections between the FDCM and ECM, testing the communication circuits, and verifying the functionality of both modules.

4. Can a faulty fuel pump trigger the U2616 code in a 2015 GMC Sierra?

While a faulty fuel pump can lead to related symptoms, the U2616 code specifically points to a communication issue between the FDCM and ECM, rather than a problem with the fuel pump itself.

5. How can I repair the U2616 code in my 2015 GMC Sierra?

Repairing this code often involves addressing the underlying communication problem by repairing or replacing faulty wiring, connectors, or modules as needed.

6. Is it safe to continue driving my 2015 GMC Sierra with the U2616 code present?

It is not recommended to drive the vehicle with the U2616 code active, as it can lead to potential safety hazards and further damage if left unaddressed.

7. Can I reset the U2616 code in my 2015 GMC Sierra using an OBDII scanner?

Resetting the U2616 code with an OBDII scanner may temporarily clear the code, but it is crucial to diagnose and repair the underlying issue to prevent the code from reoccurring.

8. How much does it typically cost to repair the U2616 code in a 2015 GMC Sierra?

The cost of repairing the U2616 code can vary depending on the specific cause of the issue, but it may involve labor costs for diagnosis and repair, as well as potential expenses for replacement parts.

9. Are there any preventive maintenance measures to avoid the U2616 code in a 2015 GMC Sierra?

Regularly inspecting and maintaining the wiring connections, modules, and components related to the FDCM and ECM can help prevent communication issues that may lead to the U2616 code.

10. Can I address the U2616 code in my 2015 GMC Sierra myself, or should I seek professional help?

While some DIY enthusiasts may attempt to diagnose and repair the U2616 code, it is often recommended to seek professional help, especially if you are unfamiliar with automotive electrical systems and diagnostics.