AutoCodes – GMC – U0230 GMC

U0230 GMC Code - Lost Communication With Liftgate 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 Liftgate Control Module, Liftgate Control Module harness is open or shorted, Liftgate 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: U0230 GMC indicates Lost Communication With Liftgate Control Module.
Common causes: Common causes include Faulty Liftgate Control Module, Liftgate Control Module harness is open or shorted, Liftgate 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 938

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 05, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0230 GMC 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 Liftgate Control Module has not been received.

OBDII Code U0230 GMC - Lost Communication With Liftgate Control Module - AutoCodes.com — U0230 GMC Code - Lost Communication With Liftgate Control Module

What does this mean?

What are the Possible Causes of the DTC U0230 GMC?

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

How to Fix the DTC U0230 GMC?

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 U0230 GMC 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 U0230 GMC Code

1. What are the common symptoms of OBDII code U0230 in a GMC related to the liftgate control module?

- Common symptoms include the liftgate not responding to commands, the liftgate getting stuck in one position, or the liftgate opening or closing on its own.

2. What are the possible causes of the U0230 code indicating a lost communication with the liftgate control module in a GMC?

- The code can be triggered by issues such as a faulty liftgate control module, damaged wiring or connectors, a blown fuse, or software glitches.

3. How can I diagnose the U0230 code in a GMC related to the liftgate control module?

- Use a diagnostic scan tool to retrieve the code and perform a thorough inspection of the liftgate control module, wiring, and connectors to identify any visible damage or loose connections.

4. What are some repair tips for resolving the U0230 code related to a lost communication with the liftgate control module in a GMC?

- Start by checking and replacing any blown fuses related to the liftgate system, inspecting and repairing any damaged wiring or connectors, and resetting the control module to see if the issue persists.

5. Can a DIY enthusiast fix the U0230 code indicating a lost communication with the liftgate control module in a GMC?

- While some basic troubleshooting steps can be performed by a DIY enthusiast, complex repairs involving specialized tools or expertise may require professional assistance.

6. Is it safe to drive a GMC with the U0230 code related to the liftgate control module issue?

- It is generally safe to drive the vehicle with this code, but it is recommended to address the problem promptly to avoid potential inconvenience or safety hazards.

7. How much does it typically cost to repair the U0230 code indicating a lost communication with the liftgate control module in a GMC?

- Repair costs can vary depending on the specific cause of the issue, but they may range from $100 to $500 for parts and labor.

8. Can resetting the vehicle's computer system help clear the U0230 code in a GMC?

- Resetting the computer system may temporarily clear the code, but if the underlying issue with the liftgate control module persists, the code is likely to reappear.

9. Are there any recalls or technical service bulletins related to the U0230 code in GMC vehicles?

- It's advisable to check with a GMC dealership or the manufacturer's website for any recalls or technical service bulletins addressing the U0230 code and associated liftgate control module concerns.

10. How can regular maintenance help prevent the U0230 code related to the liftgate control module in a GMC?

- Regularly inspecting and maintaining the liftgate system, including checking for loose connections and ensuring proper functioning of the control module, can help prevent issues leading to the U0230 code.