P1511 GMC - Throttle Control System Backup System Performance

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3  What does this mean?

P1511 GMC Possible Causes

  • Faulty Throttle Actuator Control Motor
  • Throttle Actuator Control Motor harness is open or shorted
  • Throttle Actuator Control Motor circuit poor electrical connection

First diagnose P1511 GMC code

    Check 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 terminals.

Cost of diagnosing the P1511 GMC code

    Labor: 1.0

    The cost of diagnosing the P1511 GMC 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.

P1511 GMC Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1511 GMC Meaning

The Engine Control Module (ECM) is the control center for the Throttle Actuator Control (TAC) system. The ECM determines the drivers 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:

Motor control 1

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.

OBDII Code P1511 GMC - Throttle Control System Backup System Performance - Engine-Codes.com

P1511 GMC More Information

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