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Home >> Ford >> 2009 >> Focus S, Standard >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls - Powertrain DTC Charts & Descriptions (Except Diesel & Hybrid) >> DTC Diagnosis >> DTC P2123: - Throttle/Pedal Position Sensor/Switch D Circuit High

DTC P2123: - Throttle/Pedal Position Sensor/Switch D Circuit High

DTC P2123: - THROTTLE/PEDAL POSITION SENSOR/SWITCH D CIRCUIT HIGH

Description:  The accelerator pedal position (APP) sensor 1 is out of self-test range high.
Possible Causes: 
  • APP sensor harness open (ETC system with a 3-track APP sensor)
  • APP sensor harness is short to VREF
  • 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 .