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U179D Chevrolet Code - Lost Communication With Brake System Control Module 2 On Chassis Expansion Bus

Quick Answer

The U179D code for Chevrolet indicates that there is a communication problem between the vehicle's onboard computer system and the Brake System Control Module 2 on the chassis expansion bus. Common causes include Faulty wiring or connectors leading to poor communication, A malfunctioning brake system control module 2, Issues with the chassis expansion bus. 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
U179D Chevrolet indicates Lost Communication With Brake System Control Module 2 On Chassis Expansion Bus.
Common causes
Common causes include Faulty wiring or connectors leading to poor communication, A malfunctioning brake system control module 2, Issues with the chassis expansion bus.
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 09, 2024
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Code U179D Chevrolet Description

The U179D code for Chevrolet indicates that there is a communication problem between the vehicle's onboard computer system and the Brake System Control Module 2 on the chassis expansion bus. The chassis expansion bus is a network that allows various control modules within the vehicle to communicate with each other. When there is a lost communication with the brake system control module 2, it can lead to issues with the proper functioning of the braking system.

OBDII Code U179D Chevrolet - Lost Communication With Brake System Control Module 2 On Chassis Expansion Bus
U179D Chevrolet Code - Lost Communication With Brake System Control Module 2 On Chassis Expansion Bus

Common Causes of U179D Chevrolet

  1. Faulty wiring or connectors leading to poor communication
  2. A malfunctioning brake system control module 2
  3. Issues with the chassis expansion bus
  4. Software glitches in the vehicle's computer system

Symptoms of U179D Chevrolet

  1. Illumination of the ABS warning light on the dashboard
  2. Loss of traction control and stability control features
  3. Increased braking distance or reduced braking effectiveness
  4. Difficulty in controlling the vehicle during braking or slippery road conditions

How to Fix U179D Chevrolet

  1. Conduct a comprehensive diagnostic scan to identify the specific cause of the communication loss
  2. Inspect the wiring and connectors connected to the brake system control module 2 for any damage or loose connections
  3. Test the functionality of the brake system control module 2 and replace it if necessary
  4. Check the chassis expansion bus for any faults and repair or replace as needed
  5. Update the vehicle's software to ensure proper communication between the control modules

Cost to Fix U179D Chevrolet

The cost of repairing the U179D code can vary depending on the specific cause of the issue and the parts and labor required. On average, the repair cost for this type of communication problem can range from $200 to $600. This estimate includes the cost of parts such as a new brake system control module 2 or wiring repairs, as well as the labor charges for diagnosis and repair. It is important to note that the actual repair costs can be higher or lower based on the vehicle's make and model, the location of the repair shop, and the extent of the damage. It is recommended to obtain a detailed quote from a reputable auto repair shop to determine the exact cost for addressing the U179D 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 U179D Chevrolet Code

1. What are the common symptoms of OBDII code U179D in a Chevrolet related to lost communication with Brake System Control Module 2?

- Common symptoms include the ABS warning light illuminating on the dashboard, loss of ABS functionality, and potential issues with the brake system.

2. What are some possible causes for the U179D code indicating lost communication with the Brake System Control Module 2 on the chassis expansion bus in a Chevrolet?

- Potential causes may include damaged wiring or connectors, a faulty Brake System Control Module 2, issues with the chassis expansion bus communication network, or software malfunctions.

3. How can I diagnose the U179D code in a Chevrolet indicating lost communication with the Brake System Control Module 2?

- Diagnosis typically involves using a professional OBDII scanner to retrieve the specific code, checking the wiring and connectors for any visible damage, and conducting a thorough inspection of the Brake System Control Module 2.

4. Is it safe to drive my Chevrolet with the U179D code indicating lost communication with the Brake System Control Module 2?

- It is not recommended to drive the vehicle with this code present, as it can impact the functionality of the brake system, including the ABS. It is advisable to address the issue promptly to ensure safe operation of the vehicle.

5. How can I repair the U179D code related to lost communication with the Brake System Control Module 2 in a Chevrolet?

- Repair options may include repairing or replacing damaged wiring or connectors, replacing the faulty Brake System Control Module 2, addressing any issues with the chassis expansion bus network, or performing software updates as needed.

6. Can a DIY enthusiast fix the U179D code indicating lost communication with the Brake System Control Module 2 in a Chevrolet?

- While some basic checks like inspecting wiring and connectors can be done by DIY enthusiasts, diagnosing and repairing complex issues related to this code may require professional expertise and specialized tools.

7. Are there any recalls or technical service bulletins related to the U179D code in Chevrolet vehicles?

- It is advisable to check with Chevrolet dealerships or online resources for any recalls or technical service bulletins related to the U179D code and lost communication with the Brake System Control Module 2.

8. How much does it cost to repair the U179D code indicating lost communication with the Brake System Control Module 2 in a Chevrolet?

- Repair costs can vary depending on the exact cause of the issue, parts needed, and labor rates. It is recommended to obtain quotes from reputable repair shops or dealerships for an accurate estimate.

9. Can the U179D code indicating lost communication with the Brake System Control Module 2 be intermittent in a Chevrolet?

- Yes, intermittent issues with communication can occur, leading to the code appearing sporadically. It is crucial to address the underlying problem even if the code clears temporarily to prevent potential safety risks.

10. Will resetting the OBDII system clear the U179D code related to lost communication with the Brake System Control Module 2 in a Chevrolet?

- While resetting the system may temporarily clear the code, it is essential to diagnose and address the root cause of the communication failure to prevent the code from reoccurring.

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