LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Infiniti >> 2016 >> QX50 AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Diagnostic Trouble Codes (DTCS) (P0447-P2138) >> DTC/Circuit Diagnosis >> DTC P2122, P2123: Accelerator Pedal Position (App) Sensor 1 Circuit Low/High Input >> DTC Logic >> DTC Detection Logic
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC Detection Logic

NOTE:

If DTC P2122 or P2123 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to  DTC LOGIC  . 

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P2122 Accelerator pedal position sensor 1 circuit low input An excessively low voltage from the APP sensor 1 is sent to ECM.
  • Harness or connectors

    (APP sensor 1 circuit is open or shorted.)

  • Accelerator pedal position sensor

    (APP sensor 1)
P2123 Accelerator pedal position sensor 1 circuit high input An excessively high voltage from the APP sensor 1 is sent to ECM.
scientia non olet · About LEMON Manuals