Engine-Codes
 
OBDII Code List
 
P1516 CHEVROLET

P1516 CHEVROLET - Throttle Actuator Control Module Throttle Actuator Position Performance

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

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
  • Tech notes

    There are factory service bulletins for the P1516 code on following Cadillac vehicles:

    2006-2007 Chevrolet Avalanche
    2006-2007 Chevrolet Express 1500/2500/3500
    2006-2007 Chevrolet Silverado
    2006-2007 Chevrolet Silverado Flex Fuel
    2006-2007 Chevrolet Silverado Hybrid
    2006-2007 Chevrolet Silverado SS
    2006-2007 Chevrolet Silverado 2500/3500 HD
    2006-2007 Chevrolet Suburban
    2006-2007 Chevrolet Tahoe
    Factory Service Bulletin Chevrolet OBDII Code P1516

    2002-2009 Chevrolet Trail Blazer
    2004-2012 Chevrolet Colorado
    Factory Service Bulletin Chevrolet OBDII Code P1516





    User Submitted Video

    When is the code detected?

    The Engine Control Module (ECM) has detected an out of range condition between the predicted and actual throttle position.

    Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • No throttle response
  • P1516 Chevrolet Description

    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 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.

    OBDII Code P1516 Chevrolet - Throttle Actuator Control Module Throttle Actuator Position Performance - Engine-Codes.com

    Related Information

    Repair Importance Level: 3
     
    1=Low 2=Medium 3=High  
    Repair Difficulty Level: 2
     
    1=Easy 2=Moderate 3=Hard  

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