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AutoCodes - Generic - U2104

U2104 Code - Controller Area Network Bus Reset Counter Overrun

- Code Popularity: 428 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
Table of contents
By AutoCodes.com - Updated Feb 04, 2021
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|Code U2104 Possible Causes

  • Faulty Control Module
  • Control Module harness is open or shorted
  • Control Module circuit poor electrical connection

|How do I Fix the Code U2104?

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 U2104?

Labor: 1.0

The cost of diagnosing the U2104 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 U2104 Possible Symptoms?

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

|Code U2104 Description

Modules connected to the Controller Area Network (CAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. If no communication is detected on CAN serial data circuit, the Diagnostic Trouble Code (DTC) is set. A total non-communication condition may be caused by a short to battery or voltage on any of the CAN circuits or a short between the CAN high and low circuits.
The following modules communicate on CAN serial data bus: The Body Control Module (BCM), The Electronic Brake Control Module (EBCM), The Engine/Powertrain Control Module (ECM/PCM), and The Transmission Control Module (TCM).

OBDII Code U2104 - Controller Area Network Bus Reset Counter Overrun - AutoCodes.com
U2104 Code - Controller Area Network Bus Reset Counter Overrun

|Need More Information on the U2104 Code?

Need more information on how to fix the U2104 code? Get Access to Factory Service Manuals

|Information for Specific Makes

  • U2104 Buick Controller Area Network Bus Reset Counter Overrun
  • U2104 Cadillac Controller Area Network Bus Reset Counter Overrun
  • U2104 Chevrolet Controller Area Network Bus Reset Counter Overrun
  • U2104 GMC Controller Area Network Bus Reset Counter Overrun
  • U2104 Pontiac Controller Area Network Bus Reset Counter Overrun
  • U2104 Saturn Controller Area Network Bus Reset Counter Overrun

|Need Help with the U2104 Code?

Get the U2104 code diagnosed by a professional: Find a repair shop in your area

|Code U2104 comments

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