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Home >> Nissan-Datsun >> 2009 >> Sentra Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS U0101 To P0133 (MR20DE-CALIFORNIA) >> 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. 

NOTE: If DTC P0122 or P0123 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to DTC P0643 SENSOR POWER SUPPLY .
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.)
  • Electric throttle control actuator (TP sensor 2)
P0123
0123
Throttle position sensor 2 circuit high input An excessively high voltage from the TP sensor 2 is sent to ECM.