Engine-Codes - Buick - U2104 BUICK

U2104 BUICK Code - Controller Area Network Bus Reset Counter Overrun

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

|U2104 BUICK code possible causes

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

|How is the U2104 BUICK code repair?

Start by checking 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.

|What is the cost to diagnose the U2104 BUICK code

Labor: 1.0

The cost to diagnose the U2104 BUICK 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 BUICK code possible symptoms?

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

|What is U2104 BUICK code meaning?

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).

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