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Engine-Codes – Generic – U185E

U185E Code - Fuel Injector Control Module Lost Communication With Body Control Module

Quick Answer

The U185E diagnostic trouble code indicates that the Fuel Injector Control Module (FICM) has lost communication with the Body Control Module (BCM) in the vehicle. Common causes include Corrosion or damage to wiring harnesses, Loose or damaged connectors between FICM and BCM, Faulty FICM or BCM modules. 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
U185E indicates Fuel Injector Control Module Lost Communication With Body Control Module.
Common causes
Common causes include Corrosion or damage to wiring harnesses, Loose or damaged connectors between FICM and BCM, Faulty FICM or BCM modules.
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 Sep 11, 2024
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Code U185E Description

The U185E diagnostic trouble code indicates that the Fuel Injector Control Module (FICM) has lost communication with the Body Control Module (BCM) in the vehicle. The FICM is responsible for regulating the fuel injectors, which are crucial components in the combustion process of the engine. The BCM, on the other hand, controls various functions related to the vehicle's body systems, such as lighting, power windows, and door locks.

OBDII Code U185E - Fuel Injector Control Module Lost Communication With Body Control Module
U185E Code - Fuel Injector Control Module Lost Communication With Body Control Module

Common Causes of U185E

  1. Corrosion or damage to wiring harnesses
  2. Loose or damaged connectors between FICM and BCM
  3. Faulty FICM or BCM modules
  4. Software or programming issues
  5. Electrical interference or grounding problems

Symptoms of U185E

  1. Engine misfires
  2. Rough idling
  3. Decreased fuel efficiency
  4. Stalling
  5. Malfunctioning lights, windows, or door locks

How to Fix U185E

  1. Perform a thorough inspection of the wiring harnesses and connectors between the FICM and BCM to check for any damage or corrosion.
  2. Test the FICM and BCM modules to determine if they are functioning correctly. Replace any faulty modules as needed.
  3. Check and update the software or programming of the modules to ensure compatibility and proper communication.
  4. Address any electrical interference or grounding issues that may be affecting the communication between the modules.
  5. Clear the trouble code and perform a test drive to confirm that the issue has been resolved.

Cost to Fix U185E

The typical repair costs for addressing a U185E trouble code can vary depending on the specific cause of the communication error. In general, the cost of replacing a faulty module or repairing wiring issues can range from $200 to $800, including parts and labor. It is important to note that the diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Therefore, it is recommended to check with local repair shops for a more accurate estimate based on your specific situation.

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Code U185E Information for Specific Makes

  • U185E Buick — Fuel Injector Control Module Lost Communication With Body Control Module
  • U185E Cadillac — Fuel Injector Control Module Lost Communication With Body Control Module
  • U185E Chevrolet — Fuel Injector Control Module Lost Communication With Body Control Module
  • U185E GMC — Fuel Injector Control Module Lost Communication With Body Control 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 U185E Code

1. What are the common symptoms of OBDII code U185E (Fuel Injector Control Module Lost Communication With Body Control Module)?

- Common symptoms include stalling, rough idling, poor fuel efficiency, and issues with starting the vehicle.

2. What are the possible causes of OBDII code U185E?

- The code U185E can be caused by a faulty fuel injector control module, a malfunctioning body control module, damaged wiring or connectors between the two modules, or a communication error within the vehicle's network.

3. How can I diagnose OBDII code U185E?

- Diagnosing code U185E usually involves using a professional OBDII scanner to retrieve the code and checking for any additional related codes. It is also important to inspect the fuel injector control module, body control module, and related wiring for any visible issues.

4. Can I drive my vehicle with OBDII code U185E?

- It is not recommended to drive your vehicle with code U185E as it can lead to further damage and potentially unsafe driving conditions. It's best to address the issue promptly.

5. How can I repair OBDII code U185E?

- Repairing code U185E typically involves addressing the root cause of the communication error between the fuel injector control module and body control module. This may include repairing or replacing faulty modules, repairing damaged wiring, or addressing any network communication issues.

6. Is it possible to reset OBDII code U185E without fixing the underlying issue?

- While you can clear the code with an OBDII scanner, it is not recommended to reset the code without addressing the underlying issue. The problem will likely reoccur, and it's crucial to fix the root cause to prevent further issues.

7. Can a DIY enthusiast fix OBDII code U185E at home?

- Depending on your skill level and access to tools, you may be able to address code U185E at home. However, due to the complexity of the system and potential need for specialized equipment, it's advisable to consult a professional mechanic for accurate diagnosis and repair.

8. How much does it cost to repair OBDII code U185E at a repair shop?

- The cost of repairing code U185E can vary depending on the specific cause of the issue, labor rates in your area, and whether any parts need to be replaced. It's recommended to obtain quotes from a few reputable repair shops to compare prices.

9. Is OBDII code U185E a common issue in certain vehicle makes and models?

- While code U185E can occur in various vehicle makes and models, it may be more common in specific brands known for electrical or communication system issues. It's a good idea to research common problems with your specific vehicle to see if others have experienced similar issues.

10. How can I prevent OBDII code U185E from occurring in the future?

- To prevent code U185E from occurring, it's essential to perform regular maintenance on your vehicle, including checking and cleaning electrical connections, inspecting wiring for damage, and addressing any warning signs promptly to avoid more significant issues.

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