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U18B9 Cadillac Code - Primary High Speed CAN Bus Subnet Configuration List

- Code Popularity: 306 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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By - Updated Jun 09, 2020
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|Code U18B9 Cadillac Possible Causes

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

|How do I Fix the Code U18B9 Cadillac?

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 Cadillac have Safety Recalls? → Check here

|What is the Cost to Diagnose the Code U18B9 Cadillac?

Labor: 1.0

The cost of diagnosing the U18B9 Cadillac 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 U18B9 Cadillac Possible Symptoms?

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

|Code U18B9 Cadillac 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 Cadillac - Primary High Speed CAN Bus Subnet Configuration List -
U18B9 Cadillac Code - Primary High Speed CAN Bus Subnet Configuration List

|Need More Information on the U18B9 Cadillac Code?

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

|Need Help with the U18B9 Cadillac Code?

Get the U18B9 Cadillac code diagnosed by a professional: Find a repair shop in your area

|Code U18B9 Cadillac comments

Help us improve 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 U18B9 Cadillac code? Have you replaced any parts?
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