AutoCodesBuick – U023C Buick

U023C Buick Code - Lost Communication With Night Vision Camera 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 Night Vision Camera Control Module, Night Vision Camera Control Module harness is open or shorted, Night Vision Camera 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
U023C Buick indicates Lost Communication With Night Vision Camera Control Module.
Common causes
Common causes include Faulty Night Vision Camera Control Module, Night Vision Camera Control Module harness is open or shorted, Night Vision Camera 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 468
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Apr 05, 2020
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Code U023C Buick 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 Night Vision Camera Control Module has not been received.
OBDII Code U023C Buick - Lost Communication With Night Vision Camera Control Module - AutoCodes.com
U023C Buick Code - Lost Communication With Night Vision Camera Control Module

What are the Possible Causes of the DTC U023C Buick?

  • Faulty Night Vision Camera Control Module
  • Night Vision Camera Control Module harness is open or shorted
  • Night Vision Camera Control Module circuit poor electrical connection

How to Fix the DTC U023C Buick?

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 U023C Buick 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 U023C Buick Code

1. What does OBDII code U023C mean on a Buick?

Code U023C indicates a loss of communication between the vehicle’s main computer and the Night Vision Camera Control Module.

2. What are common symptoms of code U023C on a Buick?

Symptoms may include the night vision system not working, a warning message on the dashboard, or no visible output on the night vision display.

3. What causes code U023C to appear on a Buick?

The code can be triggered by a faulty Night Vision Camera Control Module, damaged wiring or connectors, or issues with the CAN (Controller Area Network) communication bus.

4. Can a dead battery cause code U023C on a Buick?

Yes, a weak or dead battery can disrupt communication and potentially trigger this code.

5. How do you diagnose code U023C on a Buick?

Start by scanning for additional codes, inspecting the wiring and connectors to the Night Vision Camera, and checking for proper CAN bus voltage.

6. Is it safe to drive with code U023C on a Buick?

Yes, but the night vision system will not function, which may reduce visibility in low-light conditions.

7. How do you fix code U023C on a Buick?

Repairs may include replacing the Night Vision Camera Control Module, repairing damaged wiring, or clearing the code after addressing communication issues.

8. Can code U023C clear itself on a Buick?

Sometimes, if the issue is intermittent (e.g., a loose connection), the code may clear itself after several drive cycles.

9. What tools are needed to fix code U023C on a Buick?

You’ll need an OBDII scanner, a multimeter for testing circuits, and possibly manufacturer-specific diagnostic software.

10. How much does it cost to repair code U023C on a Buick?

Repair costs vary but may include $100-$300 for diagnostics and up to $1,000 or more if the Night Vision Camera Control Module needs replacement.

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