Engine-Codes - Cadillac - P1516 CADILLAC

P1516 CADILLAC - Throttle Actuator Control Module Throttle Actuator Position Performance

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3  What is this?
Table of contents

P1516 CADILLAC Possible Causes

  • Faulty Throttle Actuator Control (TAC) module
  • Throttle Actuator Control (TAC) module harness is open or shorted
  • Throttle Actuator Control (TAC) module circuit poor electrical connection
  • Check Throttle Actuator Control (TAC) module connector for water
  • Binding or bent throttle plate-failed throttle body

How is the P1516 CADILLAC code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Tech Notes

There is a factory service bulletin for the P1516 code on following Cadillac vehicles:

2006 Cadillac Escalade
2007 Cadillac Escalade
2006-2007 Cadillac Escalade Factory Service Bulletin OBDII Code P1516

What is the cost to diagnose the P1516 CADILLAC code

Labor: 1.0

The cost to diagnose the P1516 CADILLAC code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
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Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • No throttle response

P1516 CADILLAC Meaning

The Engine Control Module (ECM) is the control center for the Throttle Actuator Control (TAC) system. The ECM determines the driver's intent and then calculates the appropriate throttle response. The ECM achieves throttle positioning by providing a pulse width modulated voltage to the TAC motor. The TAC system uses the following circuits for Motor control 1 and Motor control 2.
Two processors are also used to monitor the TAC system data. Both processors are located within the ECM. Both processors monitor each other's data to verify that the indicated throttle position is correct.
The Diagnostic Trouble Code (DTC) will set when the ECM has detected an out of range condition between the predicted and actual throttle position.

More Information

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