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P1518 Buick Code - Throttle Actuator Control Module Performance

Quick Answer

The P1518 Buick code indicates an issue with the Throttle Actuator Control Module (TACM) performance. Common causes include Faulty Throttle Actuator Control Module, Wiring issues or electrical connection problems, Defective throttle body. 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
P1518 Buick indicates Throttle Actuator Control Module Performance.
Common causes
Common causes include Faulty Throttle Actuator Control Module, Wiring issues or electrical connection problems, Defective throttle body.
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 10, 2024
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Code P1518 Buick Description

The P1518 Buick code indicates an issue with the Throttle Actuator Control Module (TACM) performance. The TACM is responsible for controlling the throttle body in modern vehicles by adjusting the airflow into the engine. When this module fails to perform correctly, it can lead to a variety of performance issues in the vehicle.

OBDII Code P1518 Buick - Throttle Actuator Control Module Performance
P1518 Buick Code - Throttle Actuator Control Module Performance

Common Causes of P1518 Buick

  1. Faulty Throttle Actuator Control Module
  2. Wiring issues or electrical connection problems
  3. Defective throttle body
  4. Malfunctioning Engine Control Module

Symptoms of P1518 Buick

  1. Erratic idling
  2. Stalling
  3. Surging while driving
  4. Lack of response when pressing the accelerator pedal

How to Fix P1518 Buick

  1. Begin by conducting a thorough diagnostic scan to retrieve the P1518 code and identify the specific cause of the issue.
  2. Inspect the wiring and electrical connections related to the TACM to ensure proper connectivity.
  3. Test the throttle body for any malfunctions or sticking that may be affecting its operation.
  4. If the TACM is found to be faulty, replace it with a new unit following manufacturer guidelines.
  5. Clear the diagnostic trouble codes and perform a test drive to ensure the issue has been resolved.

Cost to Fix P1518 Buick

The typical repair costs for addressing a P1518 Buick code can range from $200 to $500, including parts and labor. However, it's essential to note that specific diagnosis time and labor rates at auto repair shops can vary based on various factors. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It's advisable to inquire about local rates to obtain a more accurate estimate for this repair.

When is the Code Detected?

The Engine Control Module (ECM) has detected a loss of data or invalid data from the Throttle Actuator Control (TAC)

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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.

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