AutoCodes – Chevrolet – U18A6 Chevrolet

U18A6 Chevrolet Code - Lost Communication With Right Object Detection Control Module On Dedicated Bus 1

Quick Answer

The side object sensor modules use radar to determine the presence of objects nearby. Common causes include Faulty Right Object Detection Control Module, Right Object Detection Control Module harness is open or shorted, Right Object Detection 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: U18A6 Chevrolet indicates Lost Communication With Right Object Detection Control Module On Dedicated Bus 1.
Common causes: Common causes include Faulty Right Object Detection Control Module, Right Object Detection Control Module harness is open or shorted, Right Object Detection 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 4,624

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 Jun 08, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U18A6 Chevrolet Description

The side object sensor modules use radar to determine the presence of objects nearby. The left side object sensor is the master that communicates on serial data. There is a private communication network between the left and right sensors. The scan tool can communicate only with the left sensor. Side blind zone alert is active when the vehicle is out of the park or the parking brake is off on manual transmission vehicles. If a vehicle is detected in the side blind zone, the warning symbols will illuminate on the appropriate side. The warning symbols will vary brightness based on the ambient light conditions. When an object is detected in the left side blind zone, the side object sensor module sends a message to the right sensor through serial data. The right sensor then supplies voltage to illuminate the visual indicator on the left side outside rearview mirror. When an object is detected in the right-side blind zone, the right side object sensor will supply a voltage to illuminate the visual indicator on the right side outside rearview mirror. The Diagnostic Trouble Code (DTC) will set a supervised periodic message that includes the transmitter device availability that has not been received.

OBDII Code U18A6 Chevrolet - Lost Communication With Right Object Detection Control Module On Dedicated Bus 1 - AutoCodes.com — U18A6 Chevrolet Code - Lost Communication With Right Object Detection Control Module On Dedicated Bus 1

What does this mean?

What are the Possible Causes of the DTC U18A6 Chevrolet?

Faulty Right Object Detection Control Module
Right Object Detection Control Module harness is open or shorted
Right Object Detection Control Module circuit poor electrical connection

How to Fix the DTC U18A6 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 U18A6 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 U18A6 Chevrolet Code

1. What are common symptoms of OBDII code U18A6 in a Chevrolet related to the Right Object Detection Control Module?

- Common symptoms include malfunctioning or inoperative right object detection features, such as parking sensors or blind spot monitoring.

2. What can cause the OBDII code U18A6 in a Chevrolet indicating a lost communication with the Right Object Detection Control Module?

- Possible causes can include damaged wiring, a faulty control module, a loose connection, or a software issue.

3. How can I diagnose the problem related to code U18A6 in a Chevrolet for the Right Object Detection Control Module?

- To diagnose the issue, you can start by checking the wiring and connections to the control module, inspecting for any physical damage, and using a diagnostic scanner to retrieve more specific information.

4. Is it safe to continue driving my Chevrolet with the U18A6 trouble code related to the Right Object Detection Control Module?

- It is generally safe to drive the vehicle with this code, but keep in mind that certain safety features like parking sensors may not function properly until the issue is resolved.

5. Can the U18A6 trouble code in a Chevrolet be cleared/reset, or does it require a specific repair?

- The code can be cleared/reset using a diagnostic scanner, but it is important to address the underlying issue causing the communication error to prevent the code from reoccurring.

6. What are some DIY repair tips for resolving the U18A6 code in a Chevrolet associated with the Right Object Detection Control Module?

- DIY repair tips may include checking and securing connections, inspecting wiring for damage, and ensuring the control module is functioning correctly.

7. How much does it typically cost to repair the U18A6 trouble code in a Chevrolet related to the Right Object Detection Control Module?

- The cost of repair can vary depending on the specific issue, but it may involve expenses for parts replacement, labor, and diagnostic services.

8. Can a faulty sensor trigger the U18A6 code in a Chevrolet's Right Object Detection Control Module?

- Yes, a faulty sensor or sensor-related issue can potentially trigger the communication error and lead to the U18A6 trouble code being stored in the vehicle's system.

9. Are there any recalls or technical service bulletins (TSBs) related to the U18A6 code in Chevrolet vehicles with Right Object Detection Control Module issues?

- It is advisable to check with a Chevrolet dealership or online resources to see if there are any relevant recalls or TSBs addressing this specific trouble code and related concerns.

10. How long does it typically take to diagnose and repair the U18A6 trouble code in a Chevrolet associated with the Right Object Detection Control Module?

- The time needed for diagnosis and repair can vary based on the complexity of the issue, availability of parts, and the repair technician's expertise, but it may range from a few hours to a day or more.