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AutoCodes - Generic - U240B

U240B Code - Radio Dedicated Bus Off

- Code Popularity: 574 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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By - Updated Jun 17, 2020
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|Code U240B Possible Causes

  • Faulty Radio
  • Radio harness is open or shorted
  • Radio circuit poor electrical connection

|How do I Fix the Code U240B?

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 U240B?

Labor: 1.0

The cost of diagnosing the U240B 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 U240B Possible Symptoms?

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

|Code U240B Description

The high-speed General Motors Local Area Network (GMLAN) serial data circuits are serial data buses used to communicate information between the devices. The high-speed GMLAN serial data circuits also connect directly to the X84 Data Link Connector (DLC) for programming purposes. If this serial data system is inoperative, some devices may still be able to communicate with the scan tool due to other serial data systems but not with each other. The device setting the Diagnostic Trouble Code (DTC) has attempted to establish communications on the high-speed GMLAN serial data circuits more than 3 times.

OBDII Code U240B - Radio Dedicated Bus Off -
U240B Code - Radio Dedicated Bus Off

|Need More Information on the U240B Code?

Need more information on how to fix the U240B code? Get Access to Factory Service Manuals

|Information for Specific Makes

|Need Help with the U240B Code?

Get the U240B code diagnosed by a professional: Find a repair shop in your area

|Code U240B 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 U240B code? Have you replaced any parts?
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