AutoCodes – Buick – U026C Buick

U026C Buick Code - Lost Communication With Right Rear Short Range Radar Sensor 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 Right Rear Short Range Radar Sensor Module, Right Rear Short Range Radar Sensor Module harness is open or shorted, Right Rear Short Range Radar Sensor 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: U026C Buick indicates Lost Communication With Right Rear Short Range Radar Sensor Module.
Common causes: Common causes include Faulty Right Rear Short Range Radar Sensor Module, Right Rear Short Range Radar Sensor Module harness is open or shorted, Right Rear Short Range Radar Sensor 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 552

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 U026C 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 Right Rear Short Range Radar Sensor Module has not been received.

OBDII Code U026C Buick - Lost Communication With Right Rear Short Range Radar Sensor Module - AutoCodes.com — U026C Buick Code - Lost Communication With Right Rear Short Range Radar Sensor Module

What does this mean?

What are the Possible Causes of the DTC U026C Buick?

Faulty Right Rear Short Range Radar Sensor Module
Right Rear Short Range Radar Sensor Module harness is open or shorted
Right Rear Short Range Radar Sensor Module circuit poor electrical connection

How to Fix the DTC U026C 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 U026C 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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Need Help with the Code?

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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 U026C Buick Code

1. What are the common symptoms of OBDII code U026C in a Buick related to the right rear short range radar sensor module?

The common symptoms include issues with the blind spot detection system, malfunctioning rear cross-traffic alert, and potential warning lights on the dashboard.

2. What are the possible causes of the U026C code indicating lost communication with the right rear short range radar sensor module in a Buick?

Possible causes may include a faulty radar sensor module, damaged wiring or connectors, software issues, or a malfunction in the vehicle's communication network.

3. How can I diagnose the U026C code in my Buick related to the right rear short range radar sensor module?

Diagnosis typically involves using a scan tool to retrieve the specific fault codes, inspecting the wiring and connectors for damage, testing the radar sensor module, and checking for any software updates.

4. Can I still drive my Buick with the U026C code indicating lost communication with the right rear short range radar sensor module?

While the vehicle may still be operable, it is recommended to have the issue diagnosed and repaired promptly to ensure the proper functioning of safety features like blind spot detection and rear cross-traffic alert.

5. How can I repair the U026C code related to the right rear short range radar sensor module in my Buick?

Repair methods may include replacing the faulty radar sensor module, repairing damaged wiring or connectors, updating software as needed, and clearing the fault codes with a scan tool.

6. Is it safe to ignore the U026C trouble code in my Buick?

Ignoring the U026C trouble code related to the right rear short range radar sensor module can compromise the functionality of important safety features, so it is not recommended to ignore the issue.

7. Can weather conditions affect the right rear short range radar sensor module and trigger the U026C code in a Buick?

Extreme weather conditions such as heavy rain, snow, or intense sunlight can potentially impact the performance of the radar sensor module and lead to communication errors triggering the U026C code.

8. How much does it typically cost to repair the U026C code indicating lost communication with the right rear short range radar sensor module in a Buick?

The cost of repair can vary depending on the specific issue, but it may involve parts and labor costs ranging from a few hundred to over a thousand dollars, depending on the extent of the problem.

9. Can a DIY enthusiast fix the U026C code related to the right rear short range radar sensor module in a Buick?

While some basic diagnosis steps can be performed by a DIY enthusiast, repairing the radar sensor module or addressing complex wiring issues may require professional expertise to ensure proper functionality and safety.

10. How often does the U026C code indicating lost communication with the right rear short range radar sensor module occur in Buick vehicles?

The occurrence of the U026C code can vary among different Buick models, but it is not uncommon for issues related to radar sensor modules to trigger this communication error, especially in vehicles equipped with advanced safety systems.