AutoCodes – GMC – U0285 GMC

U0285 GMC Code - Lost Communication With Active Grille Air Shutter 2 Motor Module

Quick Answer

The active grille air shutter actuator closes louvers at the front bumper to enhance vehicle aerodynamics in driving situations where cooling and A/C loads are relatively low and high levels of front-end airflow are not required. Common causes include Faulty Active Grille Air Shutter 2 Motor Module, Active Grille Air Shutter 2 Motor Module harness is open or shorted, Active Grille Air Shutter 2 Motor 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: U0285 GMC indicates Lost Communication With Active Grille Air Shutter 2 Motor Module.
Common causes: Common causes include Faulty Active Grille Air Shutter 2 Motor Module, Active Grille Air Shutter 2 Motor Module harness is open or shorted, Active Grille Air Shutter 2 Motor 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 2,692

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 Jan 25, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0285 GMC Description

The active grille air shutter actuator closes louvers at the front bumper to enhance vehicle aerodynamics in driving situations where cooling and A/C loads are relatively low and high levels of front-end airflow are not required. If high levels of airflow are required, the active grille air shutter actuator opens the louvers. The control signal from the chassis control module, ignition, and ground circuits enables the active grille air shutter actuator to operate. If the conditions for opening the louvers are reached the chassis control module commands the active grille air shutter actuator to open the louvers.

OBDII Code U0285 GMC - Lost Communication With Active Grille Air Shutter 2 Motor Module - AutoCodes.com — U0285 GMC Code - Lost Communication With Active Grille Air Shutter 2 Motor Module

What does this mean?

What are the Possible Causes of the DTC U0285 GMC?

Faulty Active Grille Air Shutter 2 Motor Module
Active Grille Air Shutter 2 Motor Module harness is open or shorted
Active Grille Air Shutter 2 Motor Module circuit poor electrical connection

How to Fix the DTC U0285 GMC?

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 U0285 GMC 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 U0285 GMC Code

1. What are the common symptoms of OBDII code U0285 in a GMC vehicle?

- Common symptoms include the active grille air shutter not functioning properly, poor fuel efficiency, and possibly a check engine light on the dashboard.

2. What does the OBDII code U0285 in a GMC mean?

- This code indicates a communication problem with the active grille air shutter 2 motor module in the vehicle.

3. What are the possible causes of the U0285 code in a GMC?

- Potential causes include a faulty active grille air shutter motor module, damaged wiring or connectors, software issues, or a loss of power or ground connection.

4. How can I diagnose the U0285 code in my GMC?

- Diagnosing this code typically involves checking the wiring and connectors for damage, ensuring power and ground connections are intact, and using a scan tool to communicate with the active grille air shutter motor module.

5. Can I still drive my GMC with the U0285 code present?

- It is generally not recommended to drive with this code present as it can affect the vehicle's performance and fuel efficiency. It is best to address the issue promptly.

6. How can I repair the U0285 code in my GMC?

- Repairs may involve replacing the active grille air shutter motor module, repairing any damaged wiring or connectors, ensuring proper power and ground connections, and clearing the trouble code.

7. Is it possible to reset the U0285 code in a GMC without fixing the underlying issue?

- While you can clear the trouble code with a scan tool, it is important to address the root cause of the communication problem to prevent the code from reoccurring.

8. Are there any DIY tips for troubleshooting the U0285 code in a GMC?

- DIY enthusiasts can start by visually inspecting the wiring and connectors for any obvious damage, checking fuses related to the active grille air shutter system, and ensuring all connections are secure.

9. Can a professional mechanic help with diagnosing and repairing the U0285 code in my GMC?

- Yes, a qualified mechanic with experience in diagnosing and repairing OBDII codes can efficiently troubleshoot the U0285 code and perform necessary repairs to resolve the issue.

10. How can I prevent the U0285 code from reappearing in my GMC?

- Regular maintenance, such as checking the condition of wiring and connectors, ensuring proper electrical connections, and addressing any related issues promptly, can help prevent the code from reoccurring.