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Engine-Codes – GMC – U185E GMC

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

Quick Answer

The U185E GMC code indicates that there is a communication problem between the Fuel Injector Control Module (FICM) and the Body Control Module (BCM) in the vehicle. Common causes include Faulty wiring or connectors between the FICM and BCM, Corrosion or damage to the communication lines, Defective FICM or BCM. 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 GMC indicates Fuel Injector Control Module Lost Communication With Body Control Module.
Common causes
Common causes include Faulty wiring or connectors between the FICM and BCM, Corrosion or damage to the communication lines, Defective FICM or BCM.
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 15, 2024
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Code U185E GMC Description

The U185E GMC code indicates that there is a communication problem between the Fuel Injector Control Module (FICM) and the Body Control Module (BCM) in the vehicle. The FICM is responsible for controlling the fuel injectors, which play a crucial role in the combustion process in the engine. The BCM, on the other hand, is a central electronic control unit that manages various functions such as lighting, security, and climate control.

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

Common Causes of U185E GMC

  1. Faulty wiring or connectors between the FICM and BCM
  2. Corrosion or damage to the communication lines
  3. Defective FICM or BCM
  4. Software issues or programming errors
  5. Electrical interference or short circuits

Symptoms of U185E GMC

  1. Poor fuel efficiency
  2. Rough idling
  3. Hesitation during acceleration
  4. Stalling
  5. Malfunctioning interior lighting or power accessories

How to Fix U185E GMC

  1. Begin by conducting a thorough inspection of the wiring and connectors between the FICM and BCM to check for any visible damage or corrosion.
  2. Test the communication lines using a multimeter to ensure that they are transmitting signals properly.
  3. If no issues are found with the wiring, connectors, or communication lines, proceed to diagnose the FICM and BCM for any faults or defects.
  4. Depending on the diagnosis, either repair or replace the faulty module(s) and reprogram them if necessary.
  5. Clear the diagnostic trouble codes and perform a test drive to verify that the communication between the FICM and BCM has been restored and that the symptoms have been resolved.

Cost to Fix U185E GMC

The typical repair costs for addressing a U185E GMC code can vary depending on the specific cause of the communication error and whether any parts need to be replaced. On average, the cost of repairing this issue can range from $200 to $600, including parts and labor. However, it's important to note that the actual costs may differ based on the location of the repair shop, the make and model of the vehicle, and the extent of the repairs needed. Additionally, diagnostic time and labor rates at auto repair shops can vary, with hourly rates typically falling between $80 and $150. It is recommended to obtain quotes from local shops to get a more accurate estimate for this repair.

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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 U185E GMC Code

1. What are the common symptoms of OBDII code U185E GMC?

- Common symptoms include engine misfires, rough idling, poor fuel efficiency, and potential stalling or starting issues.

2. What can cause the OBDII code U185E GMC to trigger?

- This code typically triggers when there is a communication breakdown between the fuel injector control module and the body control module.

3. How serious is the U185E GMC code?

- While the code itself may not directly affect the drivability of the vehicle, ignoring it can potentially lead to more serious issues with engine performance and fuel efficiency.

4. How can I diagnose the U185E GMC code?

- Diagnosing this code usually involves using a professional OBDII scanner to retrieve the specific trouble codes and checking for any wiring or connection issues between the modules.

5. What are some possible repair tips for resolving the U185E GMC code?

- Repair tips may include checking and repairing any damaged wiring, ensuring proper connections between modules, and possibly replacing the fuel injector control module if needed.

6. Can I drive my vehicle with the U185E GMC code activated?

- It is generally not recommended to drive with this code activated, as it can lead to potential fuel system issues and affect overall engine performance.

7. How much does it typically cost to repair the U185E GMC code?

- Repair costs can vary depending on the exact cause of the communication issue, but it may range from a few hundred to over a thousand dollars for parts and labor.

8. Is the U185E GMC code a common issue in GMC vehicles?

- While this code may not be extremely common, it can still occur in certain GMC models due to electronic communication issues between modules.

9. Can resetting the trouble codes clear the U185E GMC code?

- Resetting the trouble codes may temporarily clear the code, but if the underlying communication issue is not addressed, the code is likely to return.

10. How can I prevent the U185E GMC code from reoccurring?

- Regular maintenance, checking for loose or damaged wiring, and addressing any communication issues promptly can help prevent the code from reoccurring in the future.

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