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U007D 2018 Chevrolet Silverado Code - Control Module Communication Low Speed Extension CAN Bus Off

Quick Answer

The U007D diagnostic trouble code (DTC) for a 2018 Chevrolet Silverado indicates a problem with the Control Module Communication Low Speed Extension CAN Bus. Common causes include Faulty wiring or connections in the CAN bus system, Defective control modules, Corrosion or damage to the CAN bus connectors. 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
U007D 2018 Chevrolet Silverado indicates Control Module Communication Low Speed Extension CAN Bus Off.
Common causes
Common causes include Faulty wiring or connections in the CAN bus system, Defective control modules, Corrosion or damage to the CAN bus connectors.
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 29, 2024
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Code U007D 2018 Chevrolet Silverado Description

The U007D diagnostic trouble code (DTC) for a 2018 Chevrolet Silverado indicates a problem with the Control Module Communication Low Speed Extension CAN Bus. This code specifically points to a communication issue between control modules in the vehicle that are connected via the Controller Area Network (CAN) bus system. The CAN bus is a network that allows various electronic control modules in the vehicle to communicate with each other. When the communication on the low-speed extension CAN bus is disrupted or lost, it can lead to various issues affecting the vehicle's performance and functionality.

OBDII Code U007D 2018 Chevrolet Silverado - Control Module Communication Low Speed Extension CAN Bus Off
U007D 2018 Chevrolet Silverado Code - Control Module Communication Low Speed Extension CAN Bus Off

Common Causes of U007D 2018 Chevrolet Silverado

  1. Faulty wiring or connections in the CAN bus system
  2. Defective control modules
  3. Corrosion or damage to the CAN bus connectors
  4. Software issues or programming errors in the control modules
  5. Electrical interference or noise disrupting communication signals

Symptoms of U007D 2018 Chevrolet Silverado

  1. Check engine light illuminated on the dashboard
  2. Loss of communication with certain control modules
  3. Erratic or inconsistent operation of electronic systems
  4. Issues with starting the vehicle
  5. Reduced fuel efficiency

How to Fix U007D 2018 Chevrolet Silverado

  1. Perform a thorough inspection of the CAN bus wiring, connectors, and control modules to identify any visible damage or issues.
  2. Use a diagnostic scan tool to check for specific trouble codes and pinpoint the exact source of the communication problem.
  3. Repair or replace any damaged wiring, connectors, or control modules as needed.
  4. Clear the DTC from the vehicle's computer system and reset any affected control modules to restore proper communication.
  5. Conduct a road test to ensure that the issue has been resolved and that all systems are functioning correctly.

Cost to Fix U007D 2018 Chevrolet Silverado

The cost of repairing a U007D DTC on a 2018 Chevrolet Silverado can vary depending on the extent of the issue and the specific components that require attention. In general, the repair costs for this type of problem can range from $200 to $500, including parts and labor. However, it's important to note that diagnostic time and labor rates at auto repair shops can vary significantly. Rates typically range from $80 to $150 per hour, but may be higher in metropolitan areas or at dealerships, and lower at independent shops. For a more accurate estimate, it's recommended to consult with a local auto repair professional.

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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 U007D 2018 Chevrolet Silverado Code

1. What does the OBDII code U007D mean on a 2018 Chevrolet Silverado?

The code U007D indicates a communication fault in the Low-Speed CAN (Controller Area Network) bus, specifically that the network is "off" or not functioning properly.

2. What are common symptoms of the U007D code in a 2018 Silverado?

Symptoms include warning lights on the dashboard, intermittent electrical issues, failure of certain systems like the radio or HVAC, and potentially reduced vehicle performance.

3. What causes the U007D code to appear on a 2018 Chevrolet Silverado?

Potential causes include damaged wiring or connectors in the CAN bus network, a faulty control module, electrical interference, or a dead or weak battery.

4. How do I diagnose the U007D code on my 2018 Silverado?

Start by checking the battery voltage, inspecting all wiring and connectors for damage or corrosion, and using a diagnostic scanner to pinpoint which module is not communicating.

5. Can a weak battery trigger the U007D code on a 2018 Chevrolet Silverado?

Yes, a weak or failing battery can disrupt communication on the CAN bus network and trigger the U007D code.

6. Is it safe to drive with the U007D code active on my Silverado?

It may be safe to drive in some cases, but certain features or systems could malfunction, potentially affecting safety. It's best to address the issue promptly.

7. What repairs might fix the U007D code on a 2018 Chevrolet Silverado?

Repairs could include replacing damaged wiring, repairing or replacing connectors, reprogramming or replacing a faulty module, or replacing the battery if it's weak.

8. How much does it cost to fix the U007D code on a Chevrolet Silverado?

Repair costs vary depending on the issue, but diagnosing and fixing the problem could range from $100 for minor wiring repairs to over $1,000 if a module needs replacement.

9. Can I clear the U007D code without fixing the issue?

Clearing the code without addressing the root issue may temporarily remove the warning, but the code is likely to return until the problem is resolved.

10. What tools do I need to troubleshoot the U007D code on my 2018 Silverado?

You'll need a quality OBDII scanner capable of reading CAN bus codes, a multimeter to check voltage and continuity, and potentially wiring diagrams for your vehicle.

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