AutoCodes - Cadillac - U1040 CADILLAC

U1040 CADILLAC Code - Lost Communication With Electronic Brake Control Module

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

|U1040 CADILLAC code possible causes

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

|How do I fix the U1040 CADILLAC 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 U1040 CADILLAC code

Labor: 1.0

The cost of diagnosing the U1040 CADILLAC 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 U1040 CADILLAC code possible symptoms?

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

|U1040 CADILLAC code description

Modules connected to the class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. When a module receives a message for a critical operating parameter, the module records the identification number of the module which sent the message for the state of health monitoring/node alive messages. A critical operating parameter is one which, when not received, requires that the module use a default value for that parameter. Once an identification number is learned by a module, it will monitor for that module node alive message. Each module on the class 2 serial data circuit is required to send a Node Alive message every 2 seconds. When no message is detected from a learned identification number for 5 seconds, a Diagnostic Trouble Code (DTC) U1040 is set.
OBDII Code U1040 Cadillac - Lost Communication With Electronic Brake Control Module - AutoCodes.com

|Need more information with the U1040 CADILLAC code?

Need more information on how to fix the U1040 CADILLAC code? Get Access to Factory Service Manuals

|Need help with a U1040 CADILLAC code?

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|U1040 CADILLAC code comments

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