Vehicle applicability: This diagnostic supplement covers multiple Ford vehicles and engines. Follow the application named in the source below. Some references apply to vehicles other than Mustang.
Powertrain DTC Charts and Descriptions 4-123
Diagnostic Trouble Code (DTC) Charts and Descriptions
P2107 - Throttle Actuator Control (TAC) Module Processor (Continued) Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test DV.
P2111 - Throttle Actuator Control (TAC) System - Stuck Open
Description: This DTC sets when the PCM fault status indicates the throttle plate is at a greater angle than commanded.
Possible Causes: • Throttle body stuck open or binding
• TACM+ circuit open
• TACM- circuit open
• TACM+ and TACM- circuits are cross wired
• TACM+ and TACM- circuits are shorted together
• Damaged PCM
Diagnostic Aids:
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test DV.
P2112 - Throttle Actuator Control (TAC) System - Stuck Closed
Description: This DTC sets when the fault status indicates the throttle plate is at a lower angle than commanded.
Possible Causes: • Throttle body stuck closed
• Throttle body stuck binding
• TACM+ circuit open
• TACM- circuit open
• TACM+ and TACM- circuits are cross wired
• TACM+ and TACM- circuits are shorted together
• Damaged PCM
Diagnostic Aids:
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test DV.
P2122 - Throttle/Pedal Position Sensor/Switch D Circuit Low
Description: This DTC sets when the accelerator pedal position 1 (APP1) is out of self-test range low.
Possible Causes: • APP1 circuit open
• APP1 circuit short to ground
• Damaged APP sensor
Diagnostic Aids: An APP1 sensor PID reading may indicate a concern.
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test DK.
P2123 - Throttle/Pedal Position Sensor/Switch D Circuit High
Description: This DTC sets when the accelerator pedal position 1 (APP1) is out of self-test range high.
Possible Causes: • APP1 circuit open
• APP1 circuit short to voltage
• Damaged APP sensor
Diagnostic Aids: An APP1 sensor PID reading may indicate a concern.
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to Pinpoint Test DK.
2016 Powertrain Control/Emissions Diagnosis, Gasoline Engines, 3/2015
2016 Mustang workshop publication supplied to Mustang Atlas. Original technical text and illustrations; HTML formatting by Mustang Atlas. Source page numbering is retained for traceability. Follow the configuration, revision, warnings, and cross-references in the material. About this edition.