AutoCodes – Generic – U026D

U026D 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 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 767
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 U026D 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 - Lost Communication With Rear Middle Short Range Radar Sensor Module - AutoCodes.com
U026D Code - Lost Communication With Rear Middle Short Range Radar Sensor Module

What are the Possible Causes of the DTC U026D?

  • 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?

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 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.

Need more information about the U026D code?

Need more information on how to fix the U026D code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U026D code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

  • U026D Buick β€” Lost Communication With Rear Middle Short Range Radar Sensor Module
  • U026D Cadillac β€” Lost Communication With Rear Middle Short Range Radar Sensor Module
  • U026D Chevrolet β€” Lost Communication With Rear Middle Short Range Radar Sensor Module
  • U026D GMC β€” Lost Communication With Rear Middle Short Range Radar Sensor Module
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 Code

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

The common symptoms of code U026D include malfunctioning rear middle short range radar sensor systems, erratic behavior of safety features like blind spot monitoring and automatic braking, and dashboard warning lights.

2. What are the possible causes of OBDII code U026D?

The possible causes of code U026D include damaged wiring or connectors, a faulty rear middle short range radar sensor module, software issues, or a communication error within the vehicle's network.

3. How can I diagnose the issue related to code U026D?

Diagnosing code U026D involves checking the wiring and connectors associated with the rear middle short range radar sensor module, performing a system scan with an OBDII scanner, and inspecting for any physical damage to the sensor module.

4. Can I repair the U026D code issue myself?

If you have experience with automotive diagnostics and repair, you may be able to address code U026D by checking the connections, repairing damaged wiring, or replacing the faulty rear middle short range radar sensor module. However, it is recommended to consult a professional if unsure.

5. Is it safe to drive with OBDII code U026D present?

Driving with code U026D present is not recommended, as it can affect the proper functioning of safety features relying on the rear middle short range radar sensor module. It is advised to address the issue promptly to ensure the vehicle's safety systems are operating correctly.

6. Can a software update fix OBDII code U026D?

In some cases, a software update provided by the vehicle manufacturer can resolve communication issues leading to code U026D. It is advisable to check with a dealership or authorized service center for any available updates.

7. How much does it typically cost to repair OBDII code U026D?

The cost of repairing code U026D can vary depending on the extent of the issue, the need for replacement parts, and labor costs. It is recommended to obtain estimates from reputable repair shops or dealerships.

8. Will resetting the fault codes make OBDII code U026D disappear?

Resetting the fault codes may temporarily clear the warning lights associated with code U026D, but the underlying issue causing the fault will still persist. It is crucial to diagnose and address the root cause of the problem to prevent the code from reappearing.

9. Can extreme weather conditions trigger OBDII code U026D?

Extreme weather conditions, such as heavy rain or snow, can potentially affect the performance of the rear middle short range radar sensor module and lead to code U026D. Ensuring the sensor is clean and undamaged can help prevent weather-related issues.

10. How long does it take to repair OBDII code U026D?

The repair time for code U026D can vary based on the complexity of the issue and the availability of replacement parts. Minor repairs like fixing wiring connections may take a shorter time, while replacing the sensor module could require more extensive work.

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