AutoCodes – Cadillac – P1518 Cadillac

P1518 Cadillac Code - Throttle Actuator Control Module Performance

Quick Answer

The Throttle Actuator Control (TAC) module contains data which is essential for proper TAC operation. Common causes include Dead or weak battery, Faulty Throttle Actuator Control (TAC) module, Throttle Actuator Control (TAC) module harness is ope or shorted. 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 Dead or weak battery, Faulty Throttle Actuator Control (TAC) module, Throttle Actuator Control (TAC) module harness is ope or shorted.
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 18,876
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Aug 26, 2019
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Code P1518 Cadillac Description

The Throttle Actuator Control (TAC) module contains data which is essential for proper TAC operation. The TAC module continuously test the integrity of this data. When the TAC module is unable to write or read data to and from random access memory (RAM), or the TAC module is unable to correctly read data from the flash memory or and internal TAC module processor fault is detected and the Diagnostic Trouble Code (DTC) is set.
OBDII Code P1518 Cadillac - Throttle Actuator Control Module Performance - AutoCodes.com
P1518 Cadillac Code - Throttle Actuator Control Module Performance

What are the Possible Causes of the DTC P1518 Cadillac?

  • Dead or weak battery
  • Faulty Throttle Actuator Control (TAC) module
  • Throttle Actuator Control (TAC) module harness is ope or shorted
  • Throttle Actuator Control (TAC) module circuit poor electrical connection
  • Check Throttle Actuator Control (TAC) module connector for water

How to Fix the DTC P1518 Cadillac?

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 P1518 Cadillac 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.

Need more information about the P1518 Cadillac code?

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Need Help with the 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 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?

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