AutoCodes – Buick – U0107 Buick

U0107 Buick Code - Lost Communication With Throttle Actuator Control Module

Quick Answer

The Throttle Actuator Control (TAC) module and the Powertrain Control Module (PCM) communicate via a dedicated serial data circuit. Common causes include Faulty Throttle Actuator Control (TAC) Module, Throttle Actuator Control Module harness is open or shorted, Throttle Actuator Control Module circuit poor electrical connection (loose or broken wires). 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 Buick indicates Lost Communication With Throttle Actuator Control Module.
Common causes: Common causes include Faulty Throttle Actuator Control (TAC) Module, Throttle Actuator Control Module harness is open or shorted, Throttle Actuator Control Module circuit poor electrical connection (loose or broken wires).
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.

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Code Popularity 17,106

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 Nov 01, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U0107 Buick Description

The Throttle Actuator Control (TAC) module and the Powertrain Control Module (PCM) communicate via a dedicated serial data circuit. This serial data circuit is separated from other serial data circuits on the vehicle. Accurate transmitting and receiving of serial data require not only good circuit integrity but also sufficient system voltage. This diagnostic test monitors de accuracy of the serial data transmitted between the TAC module and the PCM. The Diagnostic Trouble Code (DTC) U0107 is set when the Powertrain Control Module detects a loss of data or invalid data from the Throttle Actuator Control.

OBDII Code U0107 Buick - Lost Communication With Throttle Actuator Control Module - AutoCodes.com — U0107 Buick Code - Lost Communication With Throttle Actuator Control Module

What does this mean?

What are the Possible Causes of the DTC U0107 Buick?

Faulty Throttle Actuator Control (TAC) Module
Throttle Actuator Control Module harness is open or shorted
Throttle Actuator Control Module circuit poor electrical connection (loose or broken wires)

How to Fix the DTC U0107 Buick?

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 U0107 Buick 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.

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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 Buick Code

1. What does the OBDII code U0107 mean for a Buick?

U0107 indicates a loss of communication between the Engine Control Module (ECM) and the Throttle Actuator Control (TAC) Module.

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

Symptoms may include reduced engine power, poor acceleration, the "Check Engine" light illuminating, or the vehicle entering limp mode.

3. What causes the U0107 code to appear on a Buick?

Common causes include a faulty TAC module, wiring issues, loose or corroded electrical connections, or a malfunctioning ECM.

4. Can I drive my Buick with a U0107 code?

Driving with a U0107 code is not recommended, as it may result in reduced power and unsafe driving conditions.

5. How do I troubleshoot the U0107 code on my Buick?

Start by checking the TAC module wiring and connectors for damage or corrosion. Ensure the battery is fully charged and test the TAC module's functionality.

6. Can a dead battery cause the U0107 code in a Buick?

Yes, a weak or dead battery can cause communication errors like U0107 due to insufficient power supply to the modules.

7. How much does it cost to fix the U0107 code on a Buick?

Repair costs vary depending on the issue, but diagnosing and fixing wiring or connector problems may cost $100â€“$500, while replacing the TAC module may cost $300â€“$800.

8. Does the U0107 code mean the throttle body needs to be replaced?

Not necessarily. The issue could be with the TAC module, wiring, or connections, so a thorough diagnosis is essential before replacing the throttle body.

9. Can a software update fix the U0107 code on a Buick?

In some cases, an ECM or TAC module software update may resolve communication issues, but this should be determined by a professional diagnostic scan.

10. Do I need a professional mechanic to fix the U0107 code on my Buick?

While basic checks like inspecting wiring can be done at home, diagnosing and repairing module communication issues often require specialized tools and expertise.