AutoCodes - Gmc - U0400 GMC

U0400 GMC Code - Invalid Data Received

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

|U0400 GMC code possible causes

  • Faulty Engine Control Module (ECM)
  • Engine Control Module harness is open or shorted
  • Engine Control Module circuit poor electrical connection
  • Engine Control Module (ECM) not configured

|How do I fix the U0400 GMC 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 U0400 GMC code

Labor: 1.0

The cost of diagnosing the U0400 GMC 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.

|When is the U0400 GMC code detected?

The control module is not configured properly.

|What are U0400 GMC code possible symptoms?

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

|U0400 GMC code description

A Controller Area Network (CAN) is a vehicle bus standard designed to interconnect automotive devices without a host computer. Operating information and commands are exchanged among the devices. The devices have programmed information about what messages are needed to be exchanged on the serial data circuits. Some devices are constantly receiving information from other devices through serial data communication network. The invalid data Diagnostic Trouble Code (DTC) will be set when a receiving device detects a discrepancy in the information it receives from the Engine Control Module (ECM) causing its integrity to be questioned.
OBDII Code U0400 Gmc - Invalid Data Received - AutoCodes.com

|Need more information with the U0400 GMC code?

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|Need help with a U0400 GMC code?

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|U0400 GMC code comments

Help us improve AutoCodes.com. 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 U0400 Gmc code? Have you replaced any parts?
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