AutoCodes - Chevrolet - U2104 CHEVROLET

U2104 CHEVROLET Code - Controller Area Network Bus Reset Counter Overrun

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3
Table of contents

|U2104 CHEVROLET code possible causes

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

|How do I fix the U2104 CHEVROLET 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.

|Cost of diagnosing the U2104 CHEVROLET code

Labor: 1.0

The cost of diagnosing the U2104 CHEVROLET code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|What are U2104 CHEVROLET code possible symptoms?

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

|U2104 CHEVROLET code 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 Chevrolet - Controller Area Network Bus Reset Counter Overrun -

|Need more information with the U2104 CHEVROLET code?

Need more information on how to fix the U2104 CHEVROLET code?
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|Need help with a U2104 CHEVROLET code?

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|U2104 CHEVROLET code comments

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