AutoCodes – Chevrolet – U185D Chevrolet

U185D Chevrolet Code - Fuel Injector Control Module Lost Communication With Engine Control Module

Quick Answer

Modules connected to the Controller Area Network (CAN) serial data circuits monitor for serial data communications during normal vehicle operation. Common causes include Faulty Engine Control Module (ECM), Engine Control Module harness is open or shorted, Engine 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: U185D Chevrolet indicates Fuel Injector Control Module Lost Communication With Engine Control Module.
Common causes: Common causes include Faulty Engine Control Module (ECM), Engine Control Module harness is open or shorted, Engine 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 663

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code U185D Chevrolet Description

Modules connected to the Controller Area Network (CAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. The modules have prerecorded information about what messages are needed to be exchanged on the serial data circuits. The messages are supervised and also, some periodic messages are used by the receiver module as an availability indication of the transmitter module. Each message contains the identification number of the transmitter module. A module with a CAN serial data circuits malfunction or which loses power during the current ignition cycle will have a Loss of Communication Diagnostic Trouble Code (DTC) set by other modules that depend on information from that failed module. If any of the CAN circuit are shorted to battery voltage, ground, or between them no communication is possible on the CAN serial data bus, a Diagnostic Trouble Code will set.

OBDII Code U185D Chevrolet - Fuel Injector Control Module Lost Communication With Engine Control Module - AutoCodes.com — U185D Chevrolet Code - Fuel Injector Control Module Lost Communication With Engine Control Module

What does this mean?

What are the Possible Causes of the DTC U185D Chevrolet?

Faulty Engine Control Module (ECM)
Engine Control Module harness is open or shorted
Engine Control Module circuit poor electrical connection

How to Fix the DTC U185D 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 U185D 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.

Need more information about the U185D Chevrolet code?

Need more information on how to fix the U185D Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U185D Chevrolet code diagnosed by a professional: Find a repair shop in your area

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 U185D Chevrolet Code

1. What are common symptoms of OBDII code U185D in a Chevrolet related to the fuel injector control module losing communication with the engine control module?

- Common symptoms include rough idling, misfires, poor engine performance, stalling, and illuminated check engine light.

2. What are possible causes of the U185D OBDII code in a Chevrolet?

- Possible causes include a faulty fuel injector control module, issues with the engine control module, wiring problems, or a communication network error.

3. How can I diagnose the U185D code in my Chevrolet related to the fuel injector control module communication issue?

- Diagnosis typically involves using a diagnostic scanner to retrieve the trouble codes, checking the communication network, inspecting wiring connections, and testing the fuel injector control module.

4. What are some repair tips for fixing the U185D code in a Chevrolet?

- Repair tips include checking and repairing any damaged wiring, ensuring proper connections between modules, testing and possibly replacing the fuel injector control module, and clearing the trouble codes.

5. Can I drive my Chevrolet with the U185D code present?

- It is not recommended to drive the vehicle with the U185D code active, as it can lead to engine performance issues and potential damage if left unresolved.

6. How much does it typically cost to repair the U185D code related to the fuel injector control module in a Chevrolet?

- Repair costs can vary depending on the exact cause of the issue, but they may range from $200 to $500 for parts and labor.

7. Is it possible to reset the U185D trouble code in a Chevrolet without fixing the underlying issue?

- While you can clear the trouble code with a diagnostic scanner, it is important to address the root cause of the problem to prevent it from recurring.

8. Are there any preventive maintenance steps I can take to avoid the U185D code in my Chevrolet?

- Regularly checking and maintaining the electrical connections, performing routine inspections of the fuel injector control module, and keeping the engine control module updated can help prevent communication issues.

9. Can a DIY enthusiast without advanced automotive knowledge fix the U185D code in a Chevrolet?

- While some simple checks like inspecting wiring connections can be done by DIY enthusiasts, diagnosing and repairing communication issues between modules may require professional expertise.

10. How long does it take to repair the U185D code related to fuel injector control module communication in a Chevrolet?

- The repair time can vary depending on the exact cause of the problem and the expertise of the technician, but it may take anywhere from 1 to 3 hours to diagnose and fix the issue.