Engine-CodesCadillac – P1518 Cadillac

P1518 Cadillac Code - Throttle Actuator Control Module Performance

Quick Answer

The P1518 diagnostic trouble code for Cadillac vehicles refers to an issue with the Throttle Actuator Control Module's performance. Common causes include Faulty Throttle Actuator Control Module, Wiring or connector issues in the throttle control circuit, Carbon buildup in the 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 Cadillac indicates Throttle Actuator Control Module Performance.
Common causes
Common causes include Faulty Throttle Actuator Control Module, Wiring or connector issues in the throttle control circuit, Carbon buildup in the 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.
Table of contents Created and updated by William Orellana on Sep 07, 2024
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Code P1518 Cadillac Description

The P1518 diagnostic trouble code for Cadillac vehicles refers to an issue with the Throttle Actuator Control Module's performance. The Throttle Actuator Control Module is responsible for controlling the throttle valve's movement based on driver input, ensuring the engine receives the correct amount of air for combustion. When this module is not functioning correctly, it can lead to various performance issues in the vehicle.

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

Common Causes of P1518 Cadillac

  1. Faulty Throttle Actuator Control Module
  2. Wiring or connector issues in the throttle control circuit
  3. Carbon buildup in the throttle body
  4. Electronic throttle body malfunction
  5. Software or programming issues

Symptoms of P1518 Cadillac

  1. Erratic throttle response
  2. Poor engine performance
  3. Stalling or hesitation while driving
  4. Check engine light illuminated
  5. Reduced fuel efficiency

How to Fix P1518 Cadillac

  1. Diagnose the issue by connecting a diagnostic scanner to retrieve the trouble code and perform a thorough inspection of the Throttle Actuator Control Module and related components.
  2. Test the Throttle Actuator Control Module to ensure it is functioning correctly or replace it if necessary.
  3. Check the wiring and connectors in the throttle control circuit for any damage or corrosion, repairing or replacing as needed.
  4. Clean the throttle body to remove any carbon buildup that may be affecting its function.
  5. Update the software or reprogram the Throttle Actuator Control Module if necessary to ensure proper operation.

Cost to Fix P1518 Cadillac

The cost of repairing a P1518 code on a Cadillac vehicle can vary depending on the specific cause of the issue and labor rates in your area. On average, you can expect to pay between $200 and $500 for parts and labor. Keep in mind that rates at auto repair shops can vary, so it's advisable to obtain quotes from multiple shops to ensure you get the best price. Additionally, factors such as the vehicle's make and model, engine type, and location can also impact the final repair cost.

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.

Frequently Asked Questions about P1518 Cadillac Code

No Frequently Asked Questions about P1518 Cadillac Code found.

Discuss the causes and fixes for P1518 Cadillac OBDII Code

  • P1518 showed up after my 2002 Escalade ext stopped running. The battery is now dead. The throttle body and the MAF has been cleaned but after putting everything together and trying to start the truck it still won't start. Also the truck think that the lights are on because they chime with the door closed and the lights in the on position. What is going on?

  • You should try testing with a fully charged battery. The P1518 code may set because the battery is too low to test and operate the throttle body. Also, once you have installed the good battery, test the charging system.

  • We have been having the same issue same 1518 code but the cadillac runs it is also in reduced engine power what could cause this

  • What model and year is your Cadillac?