Engine-Codes.com
Engine-Codes – Chevrolet – U18B7 Chevrolet

U18B7 Chevrolet Code - Lost Communication With Active Safety Control Module 2 On Chassis Expansion CAN Bus

Quick Answer

The U18B7 code for Chevrolet indicates that there is a communication problem with the Active Safety Control Module 2 on the Chassis Expansion CAN Bus. Common causes include Faulty Active Safety Control Module 2, Wiring issues such as loose or damaged connections, CAN bus network communication problems. 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
U18B7 Chevrolet indicates Lost Communication With Active Safety Control Module 2 On Chassis Expansion CAN Bus.
Common causes
Common causes include Faulty Active Safety Control Module 2, Wiring issues such as loose or damaged connections, CAN bus network communication problems.
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 11, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code U18B7 Chevrolet Description

The U18B7 code for Chevrolet indicates that there is a communication problem with the Active Safety Control Module 2 on the Chassis Expansion CAN Bus. In modern vehicles, various control modules communicate with each other through a Controller Area Network (CAN) bus system to coordinate different functions and ensure the vehicle operates smoothly. The Active Safety Control Module 2 is responsible for managing safety features such as traction control, stability control, and possibly other advanced driver assistance systems.

OBDII Code U18B7 Chevrolet - Lost Communication With Active Safety Control Module 2 On Chassis Expansion CAN Bus
U18B7 Chevrolet Code - Lost Communication With Active Safety Control Module 2 On Chassis Expansion CAN Bus

Common Causes of U18B7 Chevrolet

  1. Faulty Active Safety Control Module 2.
  2. Wiring issues such as loose or damaged connections.
  3. CAN bus network communication problems.
  4. Software glitches or programming errors.
  5. Water damage or corrosion affecting the module or wiring.

Symptoms of U18B7 Chevrolet

  1. Warning lights such as the traction control or stability control light may illuminate on the dashboard.
  2. Loss of traction control or stability control functionality.
  3. Erratic behavior of safety systems such as ABS brakes.
  4. Decreased overall vehicle stability and handling.
  5. Possible impact on other safety features like lane departure warning or collision avoidance systems.

How to Fix U18B7 Chevrolet

  1. Diagnose the specific cause of the communication loss by using a diagnostic scan tool to read the fault codes and perform a thorough inspection of the Active Safety Control Module 2, wiring, and CAN bus network.
  2. Repair or replace any damaged or faulty wiring connections related to the module.
  3. If the module itself is faulty, replace it with a new or remanufactured unit.
  4. Clear the fault codes and reset the system to ensure proper communication is restored.
  5. Test drive the vehicle to verify that the safety systems are functioning correctly and there are no warning lights illuminated on the dashboard.

Cost to Fix U18B7 Chevrolet

The cost of repairing the U18B7 code for Chevrolet can vary depending on the specific cause of the communication loss and the extent of the repairs needed. In general, the cost can range from $200 to $800, including parts and labor. However, it's important to note that the actual repair costs can be higher or lower based on factors such as the location of the repair shop, the make and model of the vehicle, and the availability of parts. Additionally, diagnostic time and labor rates can vary between different auto repair shops, so it's recommended to obtain quotes from multiple sources for a more accurate estimate.

Need more information about the U18B7 Chevrolet code?

Need more information on how to fix the U18B7 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U18B7 Chevrolet code diagnosed by a professional: Find a repair shop in your area

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 U18B7 Chevrolet Code

1. What are the common symptoms of OBDII code U18B7 in a Chevrolet related to lost communication with Active Safety Control Module 2 on Chassis Expansion CAN Bus?

- Common symptoms include the activation of warning lights on the dashboard, loss of functionality in safety control systems, and potential issues with vehicle stability and traction control.

2. What are some possible causes of the U18B7 code indicating lost communication with Active Safety Control Module 2 on the Chassis Expansion CAN Bus in a Chevrolet?

- Possible causes may include wiring harness issues, loose connections, a faulty Active Safety Control Module 2, a defective CAN bus communication network, or a malfunctioning powertrain control module.

3. How can I diagnose the U18B7 code in my Chevrolet related to lost communication with Active Safety Control Module 2 on the Chassis Expansion CAN Bus?

- Diagnosis typically involves using a professional OBDII scanner to retrieve the specific trouble codes, followed by inspecting the wiring, connectors, and modules associated with the Active Safety Control Module 2 and the CAN bus network.

4. What are some repair tips for addressing the U18B7 code in a Chevrolet due to lost communication with Active Safety Control Module 2 on the Chassis Expansion CAN Bus?

- Repair tips may include checking and repairing any damaged wiring or connectors, ensuring proper grounding, resetting the system, updating software if applicable, and replacing any faulty components identified during diagnosis.

5. Can I continue driving my Chevrolet with the U18B7 code related to lost communication with Active Safety Control Module 2 on the Chassis Expansion CAN Bus?

- It is not recommended to continue driving the vehicle with this code present, as it may affect the proper functioning of critical safety systems. Seek professional diagnosis and repair to ensure safe operation.

6. How much does it typically cost to repair the U18B7 code indicating lost communication with Active Safety Control Module 2 on the Chassis Expansion CAN Bus in a Chevrolet?

- Repair costs can vary depending on the specific underlying issue, but they may range from a few hundred to over a thousand dollars, including parts and labor.

7. Is the U18B7 OBDII code specific to Chevrolet vehicles, or can it occur in other car makes and models?

- The U18B7 code related to lost communication with Active Safety Control Module 2 on the Chassis Expansion CAN Bus is specific to Chevrolet vehicles and may not apply to other car manufacturers.

Discuss the causes and fixes for U18B7 Chevrolet OBDII Code

Submit a New Comment

Code U18B7 Chevrolet comments

No comments found for this page.