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P2111 - Throttle Actuator Control (TAC) System - Stuck Open

WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
P2111 - THROTTLE ACTUATOR CONTROL (TAC) SYSTEM - STUCK OPEN

Description:  This powertrain control module (PCM) fault status indicates the throttle plate is at a greater angle than commanded.
Possible Causes: 
  • Binding throttle body, stuck open
  • TAC motor circuits are crosswired
  • TAC motor harness circuits are shorted together
  • Damaged PCM
Diagnostic Aids:   
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All   refer to PINPOINT TEST DV .