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Engine-Codes – Generic – U0285

U0285 Code - Lost Communication With Lost Communication With Active Grille Air Shutter Module 'B'

Quick Answer

The U0285 diagnostic trouble code indicates that there is a communication failure with the Active Grille Air Shutter Module 'B' in the vehicle. Common causes include Faulty wiring or connectors leading to the Active Grille Air Shutter Module 'B', Corrosion or damage to the module or its connections, Module failure. 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 indicates Lost Communication With Lost Communication With Active Grille Air Shutter Module 'B'.
Common causes
Common causes include Faulty wiring or connectors leading to the Active Grille Air Shutter Module 'B', Corrosion or damage to the module or its connections, Module failure.
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.
What is this?
Table of contents Created and updated by William Orellana on Aug 19, 2024
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Code U0285 Description

The U0285 diagnostic trouble code indicates that there is a communication failure with the Active Grille Air Shutter Module 'B' in the vehicle. This module is responsible for controlling the airflow through the grille, which helps regulate engine temperature and improve aerodynamics. When communication with this module is lost, it can lead to issues with engine cooling, fuel efficiency, and overall performance of the vehicle. The Active Grille Air Shutter Module 'B' communicates with the vehicle's powertrain control module (PCM) to ensure proper operation, so a loss of communication can disrupt this crucial function.

OBDII Code U0285 - Lost Communication With Lost Communication With Active Grille Air Shutter Module 'B'
U0285 Code - Lost Communication With Lost Communication With Active Grille Air Shutter Module 'B'

Common Causes of U0285

  1. Faulty wiring or connectors leading to the Active Grille Air Shutter Module 'B'
  2. Corrosion or damage to the module or its connections
  3. Module failure
  4. Software or programming issues
  5. Electrical interference or disruptions

Symptoms of U0285

  1. Engine overheating
  2. Reduced fuel efficiency
  3. Poor performance or acceleration
  4. Check engine light illuminated
  5. Air conditioning issues

How to Fix U0285

  1. Begin by inspecting the wiring and connectors leading to the Active Grille Air Shutter Module 'B' for any damage or corrosion. Repair or replace as necessary.
  2. Check the module itself for any visible damage or signs of malfunction. Replace the module if needed.
  3. Clear the diagnostic trouble codes from the vehicle's PCM and reset the system to see if the issue resolves.
  4. Perform a software update or reprogramming of the module to ensure proper communication.
  5. Test the system to verify that communication has been restored and that the symptoms have been resolved.

Cost to Fix U0285

The typical repair costs for addressing a U0285 code related to the Active Grille Air Shutter Module 'B' can vary depending on the specific cause of the issue. In general, parts for this repair could range from $100 to $500, while labor costs may add another $100 to $200 to the total. It's important to consider that diagnostic time and labor rates can vary, so it's recommended to check with local auto repair shops for a more accurate estimate.

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Code U0285 Information for Specific Makes

  • U0285 Buick — Lost Communication With Active Grille Air Shutter 2 Motor Module
  • U0285 Cadillac — Lost Communication With Active Grille Air Shutter 2 Motor Module
  • U0285 Chevrolet — Lost Communication With Active Grille Air Shutter 2 Motor Module
  • U0285 Ford — Lost Communication With Lost Communication With Active Grille Air Shutter Module 'B'
  • U0285 GMC — Lost Communication With Active Grille Air Shutter 2 Motor Module
  • U0285 Lincoln — Lost Communication With Lost Communication With Active Grille Air Shutter Module 'B'
  • U0285 Mercury — Lost Communication With Lost Communication With Active Grille Air Shutter Module 'B'
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 Code

1. What are common symptoms of OBDII code U0285 (Lost Communication With Active Grille Air Shutter Module 'B')?

- Common symptoms include the check engine light coming on, reduced fuel efficiency, and potential issues with the vehicle's active grille air shutter system.

2. What can cause OBDII code U0285 to trigger?

- This code can be triggered by a faulty active grille air shutter module 'B', damaged wiring or connectors related to the module, or communication network issues.

3. How can I diagnose the cause of OBDII code U0285?

- Diagnosing this code involves checking the wiring and connectors related to the active grille air shutter module 'B', testing the module itself for faults, and ensuring there are no communication network problems.

4. Can I still drive my vehicle with OBDII code U0285 present?

- It is generally safe to drive the vehicle with this code, but it is recommended to have it diagnosed and repaired as soon as possible to prevent potential damage to the active grille air shutter system.

5. What are some repair tips for fixing OBDII code U0285?

- Repair tips include checking for loose or damaged wiring, ensuring connectors are secure, testing the active grille air shutter module 'B' for faults, and resetting the code after any repairs are made.

6. Does fixing OBDII code U0285 require specialized tools or expertise?

- While diagnosing and repairing this code may require some knowledge of automotive systems, it can usually be done with basic tools like a multimeter and a diagnostic scanner.

7. How much does it typically cost to repair OBDII code U0285?

- The cost of repairing this code can vary depending on the specific cause, but it may range from a simple wiring repair to replacing the active grille air shutter module 'B', potentially costing a few hundred dollars.

8. Are there any recalls or technical service bulletins related to OBDII code U0285?

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

9. Can extreme weather conditions affect OBDII code U0285?

- Extreme weather conditions can potentially impact the active grille air shutter system, leading to communication issues and triggering code U0285, so it's important to inspect the system for any weather-related damage.

10. How long does it take to repair OBDII code U0285?

- The repair time for this code can vary depending on the underlying cause and complexity of the repair. Simple fixes like repairing wiring may take less than an hour, while replacing the module could take a few hours.

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