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Home >> Infiniti >> 2011 >> QX56 AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P1225 Through P2A03 >> DTC P2122, P2123: App Sensor >> DTC Logic >> DTC Detection Logic
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DTC Detection Logic

NOTE: If DTC P2122 or P2123 is displayed with DTC P0643, perform the trouble diagnosis for DTC P0643. Refer to "DTC LOGIC ".
DTC DETECTION LOGIC

DTC No. Trouble diagnosis name (Trouble diagnosis content) DTC detecting condition Possible cause
P2122 APP SEN 1/CIRC (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 APP SEN 1/CIRC (Accelerator pedal position sensor 1 circuit high input) An excessively high voltage from the APP sensor 1 is sent to ECM.