AutoCodesChevrolet – U026D Chevrolet

U026D Chevrolet 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 Chevrolet 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 557
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 Chevrolet 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 Chevrolet - Lost Communication With Rear Middle Short Range Radar Sensor Module - AutoCodes.com
U026D Chevrolet Code - Lost Communication With Rear Middle Short Range Radar Sensor Module

What are the Possible Causes of the DTC U026D Chevrolet?

  • 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 Chevrolet?

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 Chevrolet 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 Chevrolet Code

1. What does the OBDII code U026D mean on a Chevrolet?

The U026D code indicates a loss of communication with the Rear Middle Short Range Radar Sensor Module, which is part of the vehicle's advanced driver-assistance systems (ADAS).

2. What are the common symptoms of the U026D code in a Chevrolet?

Symptoms may include malfunctioning blind spot monitoring, parking assist, or rear cross-traffic alert, as well as warning lights on the dashboard.

3. What causes the U026D code to appear in a Chevrolet?

Common causes include a faulty radar sensor module, damaged wiring or connectors, a blown fuse, or a software issue in the vehicle's communication network.

4. Can I drive my Chevrolet with the U026D code?

Yes, you can drive the vehicle, but safety features like blind spot monitoring or rear cross-traffic alert may not function properly, increasing the risk of accidents.

5. How do I diagnose the U026D code on my Chevrolet?

Diagnosis involves checking the radar sensor module, inspecting wiring and connectors for damage, testing for power and ground at the module, and using a scan tool to verify network communication.

6. How do I fix the U026D code on my Chevrolet?

Repairs may include replacing the faulty radar sensor module, repairing damaged wiring or connectors, updating software, or replacing a blown fuse.

7. How much does it cost to repair the U026D code on a Chevrolet?

Repair costs vary but typically range from $150 to $600, depending on whether the issue is a simple wiring repair or a complete radar sensor module replacement.

8. Can a bad battery cause the U026D code in a Chevrolet?

Yes, a weak or failing battery can disrupt communication in the vehicle's network, potentially triggering the U026D code.

9. Do I need to recalibrate the radar sensor after fixing the U026D code?

Yes, recalibration may be required after replacing or repairing the radar sensor module to ensure proper functionality of ADAS features.

10. What tools are needed to troubleshoot the U026D code on a Chevrolet?

You’ll need a professional scan tool capable of reading manufacturer-specific codes, a multimeter for electrical testing, and possibly a wiring diagram for the radar sensor module.

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