AutoCodes – Generic – U2616

U2616 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 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 3,804

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 Aug 09, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

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

What does this mean?

What are the Possible Causes of the DTC U2616?

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?

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 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 code?

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

Need Help with the Code?

Get the U2616 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

U2616 Buick — Fuel Pump Driver Control Module Lost Communication With ECM
U2616 Cadillac — Fuel Pump Driver Control Module Lost Communication With ECM
U2616 Chevrolet — Fuel Pump Driver Control Module Lost Communication With ECM
U2616 GMC — Fuel Pump Driver Control Module Lost Communication With ECM

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 Code

1. What are common symptoms of OBDII code U2616 related to the fuel pump driver control module?

- Common symptoms include engine stalling, no start condition, poor fuel economy, and illuminated check engine light.

2. What are the possible causes of OBDII code U2616 indicating a loss of communication between the fuel pump driver module and ECM?

- Possible causes include a faulty fuel pump driver control module, wiring issues, a defective ECM, or a communication network problem.

3. How can I diagnose the issue associated with OBDII code U2616 at home?

- You can start by checking the wiring connections between the fuel pump driver module and ECM, inspecting for any visible damage or corrosion. You may also use a scan tool to read live data and monitor communication between the modules.

4. Is it safe to continue driving with OBDII code U2616 present?

- It's not recommended to drive the vehicle with this code present, as it may lead to potential fuel delivery issues and engine performance problems.

5. What are some repair tips for addressing OBDII code U2616?

- Repair tips include checking and repairing any damaged wiring, replacing the fuel pump driver module if necessary, and ensuring proper communication between the modules.

6. Can a DIY enthusiast fix OBDII code U2616 on their own?

- While some basic troubleshooting steps can be performed by a DIY enthusiast, diagnosing and repairing complex communication issues may require professional diagnostic equipment and expertise.

7. How much does it typically cost to repair OBDII code U2616 related to the fuel pump driver control module?

- The cost of repairs can vary depending on the root cause of the issue, but it may range from $200 to $600 including parts and labor.

8. Are there any preventive measures to avoid encountering OBDII code U2616 in the future?

- Regular maintenance, such as checking and cleaning electrical connections, can help prevent communication issues between modules that trigger this code.

9. How urgent is it to address OBDII code U2616 once it appears?

- It is recommended to address the issue promptly to prevent potential fuel delivery problems and engine performance issues that may worsen over time.

10. Can a faulty fuel pump driver control module cause other related codes to appear along with U2616?

- Yes, a faulty fuel pump driver control module can lead to various other communication-related trouble codes being triggered in the vehicle's system.