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AutoCodes - Generic - U18B9

U18B9 Code - Primary High Speed CAN Bus Subnet Configuration List

- Code Popularity: 746 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
By AutoCodes.com - Updated Jun 09, 2020
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|U18B9 code possible causes

  • Faulty Module that is not configured
  • Module harness is open or shorted
  • Module circuit poor electrical connection

|How do I fix code U18B9 code?

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

|Cost of diagnosing U18B9 code

Labor: 1.0

The cost of diagnosing the U18B9 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 U18B9 code possible symptoms?

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

|U18B9 code description

The devices on the high-speed General Motor Local Area Network (GMLAN) serial data bus and the chassis high-speed GMLAN serial data bus must be programmed with software that specifically identifies the correct type and quantity of devices on the bus based on RPO configuration. If a device was not properly configured after installation, the appropriate U Code may be set for that device. No external circuit diagnosis is involved. The Diagnostic Trouble Code (DTC) will set when the device is not configured properly or the device recognizes a programming error.

OBDII Code u18b9 - Primary High Speed CAN Bus Subnet Configuration List - AutoCodes.com
U18B9 Code - Primary High Speed CAN Bus Subnet Configuration List

|Need more information with the U18B9 code?

Need more information on how to fix the U18B9 code? Get Access to Factory Service Manuals

|Information for specific makes

  • U18B9 BUICK Primary High Speed CAN Bus Subnet Configuration List
  • U18B9 CADILLAC Primary High Speed CAN Bus Subnet Configuration List
  • U18B9 CHEVROLET Primary High Speed CAN Bus Subnet Configuration List
  • U18B9 GMC Primary High Speed CAN Bus Subnet Configuration List

|Need help with a U18B9 code?

Get the u18b9 code diagnosed by a professional: Find a repair shop in your area

|U18B9 code comments

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