AutoCodes.com | All About OBDII Engine Codes
AutoCodes - Generic - U18B8

U18B8 Code - Lost Communication With Body Control Module On High Speed CAN Bus

- Code Popularity: 211 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
By AutoCodes.com - Updated Jun 09, 2020
Share on Facebook   Share on Twitter   Share on Linkedin

|Code U18B8 Possible Causes

  • Faulty Body Control Module (BCM)
  • Body Control Module harness is open or shorted
  • Body Control Module circuit poor electrical connection

|How do I Fix the Code U18B8?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Does your Car have Safety Recalls? → Check here

|What is the Cost to Diagnose the Code U18B8?

Labor: 1.0

The cost of diagnosing the U18B8 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

|What are Code U18B8 Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|Code U18B8 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 set a supervised periodic message that includes the transmitter device availability that has not been received.

OBDII Code U18B8 - Lost Communication With Body Control Module On High Speed CAN Bus - AutoCodes.com
U18B8 Code - Lost Communication With Body Control Module On High Speed CAN Bus

|Need More Information on the U18B8 Code?

Need more information on how to fix the U18B8 code? Get Access to Factory Service Manuals

|Information for Specific Makes

  • U18B8 Buick Lost Communication With Body Control Module On High Speed CAN Bus
  • U18B8 Cadillac Lost Communication With Body Control Module On High Speed CAN Bus
  • U18B8 Chevrolet Lost Communication With Body Control Module On High Speed CAN Bus
  • U18B8 GMC Lost Communication With Body Control Module On High Speed CAN Bus

|Need Help with the U18B8 Code?

Get the U18B8 code diagnosed by a professional: Find a repair shop in your area

|Code U18B8 comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the U18B8 code? Have you replaced any parts?
Any information is appreciated. Thanks