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AutoCodes - Generic - U0438

U0438 Code - Invalid Data Received From Trailer Brake Control Module

- Code Popularity: 4,203 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC U0438?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Trailer Brake Control Module
  • Trailer Brake Control Module harness is open or shorted
  • Trailer Brake Control Module circuit poor electrical connection
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How to Fix the DTC U0438?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U0438 code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

Code U0438 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 Trailer Brake Control Module causing its integrity to be questioned.

OBDII Code U0438 - Invalid Data Received From Trailer Brake Control Module - AutoCodes.com
U0438 Code - Invalid Data Received From Trailer Brake Control Module

Need More Information on the Code?

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Information for Specific Makes

  • U0438 Buick Invalid Data Received From Trailer Brake Control Module
  • U0438 Cadillac Invalid Data Received From Trailer Brake Control Module
  • U0438 Chevrolet Invalid Data Received From Trailer Brake Control Module
  • U0438 Chrysler Invalid Data Received From Trailer Brake Control Module
  • U0438 Dodge Invalid Data Received From Trailer Brake Control Module
  • U0438 GMC Invalid Data Received From Trailer Brake Control Module
  • U0438 Jeep Invalid Data Received From Trailer Brake Control Module
  • U0438 RAM Invalid Data Received From Trailer Brake Control Module

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Code U0438 comments

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