AutoCodes – Chevrolet – U0128 Chevrolet

U0128 Chevrolet Code - Lost Communication With Park Brake Control Module

Quick Answer

Modules connected to the high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Park Brake Control Module, Park Brake Control Module harness is open or shorted, Park Brake Control Module circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: U0128 Chevrolet indicates Lost Communication With Park Brake Control Module.
Common causes: Common causes include Faulty Park Brake Control Module, Park Brake Control Module harness is open or shorted, Park Brake Control Module circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 4,148

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 01, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0128 Chevrolet Description

Modules connected to the high speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. The modules have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver module as an availability indication of the transmitter module. The supervision time-out period is 250 ms. Each message contains the identification number of the transmitter module. The Diagnostic Trouble Code (DTC) sets when a periodic message from the Park Brake Control Module has not been received.

OBDII Code U0128 Chevrolet - Lost Communication With Park Brake Control Module - AutoCodes.com — U0128 Chevrolet Code - Lost Communication With Park Brake Control Module

What does this mean?

What are the Possible Causes of the DTC U0128 Chevrolet?

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

How to Fix the DTC U0128 Chevrolet?

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the U0128 Chevrolet code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about U0128 Chevrolet Code

1. What are the common symptoms of OBDII code U0128 in a Chevrolet related to lost communication with the Park Brake Control Module?

- Common symptoms include the parking brake not functioning properly, the brake warning light illuminating on the dashboard, and potential issues with the electronic parking brake system.

2. What are some possible causes of the U0128 OBDII code in a Chevrolet indicating a communication problem with the Park Brake Control Module?

- Possible causes may include faulty wiring or connectors, a malfunctioning Park Brake Control Module, a drained or weak battery, or issues with the CAN bus communication network.

3. How can I diagnose the U0128 trouble code in my Chevrolet to determine if the Park Brake Control Module is the issue?

- Diagnosing the code typically involves using a professional OBDII scanner to retrieve the specific error codes, checking the wiring and connectors for signs of damage, and testing the Park Brake Control Module for proper functionality.

4. Are there any simple troubleshooting steps I can take before seeking professional help for the U0128 code related to lost communication with the Park Brake Control Module in my Chevrolet?

- Yes, you can start by checking the fuses related to the braking system, ensuring the battery is fully charged, inspecting the wiring for visible damage, and resetting the error codes to see if the issue recurs.

5. Can a DIY enthusiast repair the U0128 code indicating lost communication with the Park Brake Control Module in a Chevrolet, or is it recommended to seek professional assistance?

- While some basic troubleshooting steps can be taken by a DIY enthusiast, diagnosing and repairing the underlying cause of the U0128 code often requires specialized equipment and knowledge, making professional assistance advisable.

6. If the U0128 trouble code persists in my Chevrolet even after attempting basic troubleshooting, what should be my next course of action?

- If the code persists, it is recommended to have the vehicle inspected by a qualified mechanic or dealership to conduct a thorough diagnosis and determine the exact cause of the communication issue with the Park Brake Control Module.

7. Is it safe to continue driving my Chevrolet with the U0128 OBDII code indicating a problem with the Park Brake Control Module communication?

- It is not recommended to continue driving the vehicle with unresolved brake system issues, as this could compromise safety. It is advisable to address the U0128 code promptly to ensure the proper function of the parking brake system.

8. Will resetting the U0128 trouble code in my Chevrolet make the issue related to the Park Brake Control Module communication go away permanently?

- Simply resetting the trouble code may temporarily clear the dashboard warning light, but if the underlying issue with the Park Brake Control Module communication is not addressed, the code is likely to reappear.

9. How much can I expect to pay for repairs related to the U0128 code in a Chevrolet due to lost communication with the Park Brake Control Module?

- The cost of repairs can vary depending on the exact cause of the communication issue, but it is recommended to budget for diagnostic fees, potential replacement of components, and labor costs, which can range from a few hundred to over a thousand dollars.

10. Are there any recalls or technical service bulletins related to the U0128 OBDII code in Chevrolet vehicles specifically concerning the Park Brake Control Module communication problem?

- It is advisable to check with Chevrolet dealerships or the manufacturer's website for any recalls or technical service bulletins related to the U0128 code and communication issues with the Park Brake Control Module to see if there are any relevant updates or remedies available.