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Home >> Nissan-Datsun >> 2012 >> Xterra PRO-4X, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0605 To P2A03 >> DTC P2122, P2123: App Sensor >> On Board Diagnosis Logic >> Notes

On Board Diagnosis Logic: Notes

These self-diagnoses have the one trip detection logic. 

NOTE: If DTC P2122 or P2123 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to P0643 SENSOR POWER SUPPLY .
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P2122 2122 Accelerator pedal position sensor 1 circuit low input An excessively low voltage from the APP sensor 1 is sent to ECM.
  • Harness or connectors (The APP sensor 1 circuit is open or shorted.)
  • Accelerator pedal position sensor (APP sensor 1)
P2123 2123 Accelerator pedal position sensor 1 circuit high input An excessively high voltage from the APP sensor 1 is sent to ECM.
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