Engine-Codes.com
Engine-Codes – Generic – U0106

U0106 Code - Lost Communication With Glow Plug Control Module

Quick Answer

The U0106 diagnostic trouble code (DTC) indicates that the engine control module (ECM) has lost communication with the glow plug control module. Common causes include Wiring harness issues, such as breaks, shorts, or corrosion, Faulty connectors or poor electrical connections between the ECM and glow plug control module, Malfunctioning glow plug control module. 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
U0106 indicates Lost Communication With Glow Plug Control Module.
Common causes
Common causes include Wiring harness issues, such as breaks, shorts, or corrosion, Faulty connectors or poor electrical connections between the ECM and glow plug control module, Malfunctioning glow plug control module.
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 08, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code U0106 Description

The U0106 diagnostic trouble code (DTC) indicates that the engine control module (ECM) has lost communication with the glow plug control module. In diesel engines, glow plugs are crucial for starting the engine, especially in cold weather conditions. The glow plug control module is responsible for controlling the operation of the glow plugs to ensure proper combustion during engine startup.

OBDII Code U0106 - Lost Communication With Glow Plug Control Module
U0106 Code - Lost Communication With Glow Plug Control Module

Common Causes of U0106

  1. Wiring harness issues, such as breaks, shorts, or corrosion.
  2. Faulty connectors or poor electrical connections between the ECM and glow plug control module.
  3. Malfunctioning glow plug control module.
  4. ECM software or hardware issues affecting communication.
  5. Physical damage to the ECM or glow plug control module.

Symptoms of U0106

  1. Difficulty starting the engine, especially in cold weather.
  2. Rough or unstable idling when the engine is running.
  3. Reduced engine performance and power output.
  4. Illumination of the check engine light on the dashboard.
  5. Increased fuel consumption due to inefficient combustion.

How to Fix U0106

  1. Perform a thorough visual inspection of the wiring harness and connectors for any signs of damage or corrosion. Repair or replace as necessary.
  2. Use a diagnostic scan tool to check for specific fault codes related to the glow plug control module and ECM communication.
  3. Test the glow plug control module for proper functionality and replace if found to be faulty.
  4. Reset the ECM to clear the fault code and reestablish communication with the glow plug control module.
  5. Conduct a test drive to ensure the issue has been resolved and that the engine starts smoothly in cold conditions.

Cost to Fix U0106

The cost of repairing the U0106 code can vary depending on the specific cause of the communication failure. In general, the replacement of a glow plug control module can range from $200 to $500, including parts and labor. Additional costs may apply if wiring repairs or ECM replacement are required. Diagnostic time and labor rates at auto repair shops can vary, so it's advisable to check with local providers for a more accurate estimate.

Need more information about the U0106 code?

Need more information on how to fix the U0106 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the U0106 code diagnosed by a professional: Find a repair shop in your area

Code U0106 Information for Specific Makes

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 U0106 Code

No Frequently Asked Questions about U0106 Code found.

Discuss the causes and fixes for U0106 OBDII Code

Submit a New Comment

Code U0106 comments

No comments found for this page.