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Home >> Nissan-Datsun >> 2008 >> Quest Base >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System - DTCS U1000 Through P0153 >> DTC P0122, P0123 TP Sensor >> On Board Diagnosis Logic >> Notes
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On Board Diagnosis Logic: Notes

These self-diagnoses have the one trip detection logic. 

DTC DETECTING CONDITION AND POSSIBLE CAUSE

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P0122
0122
Throttle position sensor 2 circuit low input An excessively low voltage from the TP sensor 2 is sent to ECM.
  • Harness or connectors (TP sensor 2 circuit is open or shorted.)

    (APP sensor 2 circuit is shorted.)

  • Electric throttle control actuator (TP sensor 2)

    Accelerator pedal position sensor.

    (APP sensor 2)

P0123
0123
Throttle position sensor 2 circuit high input An excessively high voltage from the TP sensor 2 is sent to ECM.