AutoCodes – Buick – U026D Buick

U026D Buick Code - Lost Communication With Rear Middle 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 Rear Middle Short Range Radar Sensor Module, Rear Middle Short Range Radar Sensor Module harness is open or shorted, Rear Middle 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: U026D Buick indicates Lost Communication With Rear Middle Short Range Radar Sensor Module.
Common causes: Common causes include Faulty Rear Middle Short Range Radar Sensor Module, Rear Middle Short Range Radar Sensor Module harness is open or shorted, Rear Middle 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 491

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 U026D 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 Rear Middle Short Range Radar Sensor Module has not been received.

OBDII Code U026D Buick - Lost Communication With Rear Middle Short Range Radar Sensor Module - AutoCodes.com — U026D Buick Code - Lost Communication With Rear Middle Short Range Radar Sensor Module

What does this mean?

What are the Possible Causes of the DTC U026D Buick?

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

How to Fix the DTC U026D 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 U026D 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 U026D Buick Code

1. What are common symptoms of the U026D Buick OBDII code?

- Common symptoms include the malfunction indicator light (MIL) illuminating on the dashboard, issues with rear middle short-range radar sensor functionality, and potential problems with advanced driver assistance systems (ADAS).

2. What is the main cause of the U026D Buick trouble code?

- The main cause of the U026D code is a communication failure between the vehicle's onboard diagnostics system and the rear middle short-range radar sensor module.

3. How do I diagnose the U026D Buick code?

- Diagnosing the U026D code involves using a diagnostic scanner to retrieve the specific fault codes stored in the vehicle's system related to the communication loss with the rear middle short-range radar sensor module.

4. What are some repair tips for addressing the U026D Buick code?

- Repair tips include checking the wiring and connections leading to the rear middle short-range radar sensor module, ensuring proper power supply to the module, and potentially replacing the sensor module if necessary.

5. Can the U026D code be fixed without professional help?

- While some basic checks and repairs can be done by DIY enthusiasts, diagnosing and repairing the U026D code may require specialized equipment and expertise, so seeking professional help is recommended.

6. Will driving with the U026D Buick code active cause any harm?

- Driving with the U026D code may disable certain safety features like rear parking sensors or collision warning systems, so it is advisable to address the issue promptly to ensure optimal vehicle safety.

7. How much does it typically cost to repair the U026D Buick trouble code?

- The cost of repairing the U026D code can vary depending on the underlying cause, but it may involve expenses for diagnostic services, replacement parts, and labor, potentially ranging from a few hundred to over a thousand dollars.

8. Can resetting the OBDII system clear the U026D code?

- Resetting the OBDII system may temporarily clear the U026D code, but if the root cause of the communication issue with the rear middle short-range radar sensor module persists, the code is likely to reappear.

9. Are there any recalls or technical service bulletins related to the U026D Buick code?

- It is recommended to check with the manufacturer or authorized dealerships for any recalls or technical service bulletins related to the U026D code, as there may be specific repair instructions or warranty coverage available.

10. How urgent is it to address the U026D Buick trouble code?

- While the vehicle may still be operational with the U026D code present, addressing the issue promptly is important to ensure the proper functioning of safety systems and avoid potential safety risks while driving.