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P1518 GMC - Throttle Actuator Control Module Performance

Possible causes
- 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
What does this mean? What does this mean?
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)
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- No throttle response
P1518 Gmc 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.

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