U179D Code - Lost Communication With Brake System Control Module 2 On Chassis Expansion Bus
Quick Answer
The Local Interconnect Network (LIN) Bus consists of a single wire with a transmission rate of 10.417 Kbit/s. Common causes include Faulty Brake System Control Module 2, Brake System Control Module 2 harness is open or shorted, Brake System Control Module 2 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
- U179D indicates Lost Communication With Brake System Control Module 2 On Chassis Expansion Bus.
- Common causes
- Common causes include Faulty Brake System Control Module 2, Brake System Control Module 2 harness is open or shorted, Brake System Control Module 2 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.
Code U179D Description
What are the Possible Causes of the DTC U179D?
- Faulty Brake System Control Module 2
- Brake System Control Module 2 harness is open or shorted
- Brake System Control Module 2 circuit poor electrical connection
How to Fix the DTC U179D?
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 U179D 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.
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Information for Specific Makes
- U179D Buick — Lost Communication With Brake System Control Module 2 On Chassis Expansion Bus
- U179D Cadillac — Lost Communication With Brake System Control Module 2 On Chassis Expansion Bus
- U179D Chevrolet — Lost Communication With Brake System Control Module 2 On Chassis Expansion Bus
- U179D GMC — Lost Communication With Brake System Control Module 2 On Chassis Expansion Bus
Frequently Asked Questions about U179D Code
1. What are the common symptoms of OBDII code U179D - Lost Communication With Brake System Control Module 2 On Chassis Expansion Bus?
- Common symptoms include the ABS warning light or traction control light illuminating on the dashboard, loss of ABS functionality, and potential issues with the brake system.
2. What are the possible causes of OBDII code U179D?
- The code U179D can be caused by a loose or damaged wiring connection, a faulty brake system control module, a communication network issue, or a malfunction within the chassis expansion bus.
3. How can I diagnose OBDII code U179D at home?
- You can start by checking the wiring connections related to the brake system control module 2, inspecting for any visible damage, and ensuring all connections are secure. You may also use an OBDII scanner to read and clear the code for troubleshooting.
4. Is it safe to drive with OBDII code U179D present?
- It is not recommended to drive the vehicle with code U179D active, as it could indicate a potential issue with the brake system control module 2, leading to safety concerns and compromised braking performance.
5. How do I repair OBDII code U179D - Lost Communication With Brake System Control Module 2 On Chassis Expansion Bus?
- Repairing this code typically involves addressing the root cause, such as repairing or replacing damaged wiring, fixing any faulty brake system control module, or resolving communication network issues. Professional diagnosis and repair may be required.
6. Can a DIY enthusiast fix OBDII code U179D, or should I seek professional help?
- While some basic troubleshooting steps can be done by a DIY enthusiast, resolving OBDII code U179D often requires specialized tools and expertise. It is recommended to consult a professional mechanic for accurate diagnosis and repair.
7. How much does it cost to fix OBDII code U179D?
- The cost of fixing OBDII code U179D can vary depending on the underlying issue causing the communication loss with the brake system control module 2. Costs may include parts replacement, labor charges, and diagnostic fees.
8. Will resetting the OBDII system clear code U179D permanently?
- Resetting the OBDII system may temporarily clear the code, but if the root cause of the communication issue is not addressed, the code is likely to reappear. It is essential to diagnose and fix the underlying problem for a permanent solution.
9. Can extreme weather conditions cause OBDII code U179D to trigger?
- Extreme weather conditions, such as excessive heat or moisture, can potentially impact the electrical connections and communication network, leading to the activation of code U179D. Inspecting and securing connections can help prevent weather-related issues.
10. Are there any recalls or technical service bulletins related to OBDII code U179D?
- It is advisable to check with the vehicle manufacturer or authorized service centers for any recalls or technical service bulletins related to OBDII code U179D. These resources may provide valuable information on known issues and solutions.
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