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Engine-Codes – GMC – U0107 GMC

U0107 GMC Code - Lost Communication With Throttle Actuator Control Module

Quick Answer

The U0107 GMC code indicates that there is a communication problem between the Engine Control Module (ECM) and the Throttle Actuator Control Module (TAC). Common causes include Faulty wiring or connectors between the ECM and TAC, A malfunctioning Throttle Actuator Control Module, Issues with the Engine 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
U0107 GMC indicates Lost Communication With Throttle Actuator Control Module.
Common causes
Common causes include Faulty wiring or connectors between the ECM and TAC, A malfunctioning Throttle Actuator Control Module, Issues with the Engine 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 13, 2024
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Code U0107 GMC Description

The U0107 GMC code indicates that there is a communication problem between the Engine Control Module (ECM) and the Throttle Actuator Control Module (TAC). The TAC is responsible for controlling the throttle opening based on input from the ECM. When communication is lost between these two modules, it can lead to issues with throttle response and overall engine performance. This can result in poor acceleration, rough idling, and even stalling of the vehicle.

OBDII Code U0107 GMC - Lost Communication With Throttle Actuator Control Module
U0107 GMC Code - Lost Communication With Throttle Actuator Control Module

Common Causes of U0107 GMC

  1. Faulty wiring or connectors between the ECM and TAC.
  2. A malfunctioning Throttle Actuator Control Module.
  3. Issues with the Engine Control Module.
  4. Software glitches or communication errors.
  5. Electrical interference or shorts in the wiring harness.

Symptoms of U0107 GMC

  1. Poor acceleration or lack of response when pressing the gas pedal.
  2. Engine stalling or rough idling.
  3. Reduced fuel efficiency.
  4. Illumination of the Check Engine Light.
  5. Limited engine power or "limp mode" operation.

How to Fix U0107 GMC

  1. Begin by conducting a thorough inspection of the wiring harness and connectors between the ECM and TAC. Look for any signs of damage, corrosion, or loose connections. Repair or replace any damaged components.
  2. Test the Throttle Actuator Control Module using a scan tool to check for proper functionality. Replace the TAC module if necessary.
  3. Check the Engine Control Module for any faults or errors. Update the ECM software if needed or replace the module if it is faulty.
  4. Clear the diagnostic trouble codes from the vehicle's memory using a scan tool and perform a test drive to ensure that the issue has been resolved.
  5. If the problem persists, consult a professional mechanic or dealership for further diagnosis and repair.

Cost to Fix U0107 GMC

The cost of repairing a U0107 GMC code can vary depending on the specific cause of the issue. In general, the repair costs for this type of problem can range from $200 to $800, including parts and labor. However, it is important to note that labor rates at auto repair shops can vary widely, typically ranging from $80 to $150 per hour. Additionally, the cost of parts and the complexity of the repair can also impact the final cost. It is recommended to obtain a detailed estimate from a trusted mechanic or dealership to determine the exact cost of addressing this issue.

What does this mean?

Tech Notes for U0107 GMC

There is a factory service bulletin for the U0107 code on following Cadillac vehicles:



2006-2007 GMC Savana 1500/2500/3500

2006-2007 GMC Sierra

2006-2007 GMC Sierra Flex Fuel

2006-2007 GMC Sierra Hybrid

2006-2007 GMC Sierra Performance Edition

2006-2007 GMC Sierra 2500/3500 HD

2006-2007 GMC Yukon

GMC Factory Service Bulletin OBDII Code U0107

Need more information about the U0107 GMC code?

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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 U0107 GMC Code

1. What does the OBDII code U0107 GMC mean?

The code U0107 GMC indicates a communication problem between the engine control module (ECM) and the throttle actuator control module.

2. What are the common symptoms of a U0107 GMC code?

Common symptoms of a U0107 GMC code include engine stalling, reduced engine power, rough idling, and the illumination of the Check Engine Light.

3. What are the possible causes of a U0107 GMC code?

Possible causes of a U0107 GMC code include damaged wiring or connectors, a faulty throttle actuator control module, a malfunctioning engine control module (ECM), or a weak battery.

4. How can I diagnose a U0107 GMC code?

Diagnosing a U0107 GMC code typically involves using a scan tool to retrieve the code, checking for any related codes, inspecting the wiring and connectors for damage, and testing the throttle actuator control module and ECM.

5. How can I repair a U0107 GMC code?

Repairing a U0107 GMC code may involve repairing or replacing damaged wiring or connectors, replacing the throttle actuator control module, reprogramming the ECM, or addressing any underlying issues causing communication errors.

6. Can I drive my vehicle with a U0107 GMC code?

It is not recommended to drive your vehicle with a U0107 GMC code, as it can lead to engine performance issues and potential safety hazards. It is advisable to address the issue promptly.

7. How much does it cost to fix a U0107 GMC code?

The cost of fixing a U0107 GMC code can vary depending on the underlying cause of the issue, the extent of the repairs needed, and labor costs. It is recommended to consult a professional mechanic for an accurate diagnosis and cost estimate.

8. Is a U0107 GMC code a common issue in GMC vehicles?

While U0107 GMC codes can occur in GMC vehicles, they are not as common as some other OBDII codes. However, it is important to address the issue promptly to prevent further damage to the vehicle.

9. Can a U0107 GMC code be triggered by a loose gas cap?

A U0107 GMC code is not typically triggered by a loose gas cap. This code is more commonly related to communication issues between the ECM and throttle actuator control module.

10. How can I prevent a U0107 GMC code from occurring in the future?

To prevent a U0107 GMC code from occurring in the future, it is important to perform regular vehicle maintenance, address any warning lights promptly, and ensure that all electrical connections are secure and in good condition.

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