FixVault

On Board Diagnosis Logic: Notes

WARNING: This page is about a different car, the 2011 Nissan Xterra. However, it is still accessible from the selected car via links, so may be relevant.

This self-diagnosis has the one trip detection logic. 

NOTE: If DTC P2138 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to P0643 SENSOR POWER SUPPLY .
DTC DETECTION CONDITION CHART

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P2138
2138
Accelerator pedal position sensor circuit range/performance Rationally incorrect voltage is sent to ECM compared with the signals from APP sensor 1 and APP sensor 2.
  • Harness or connector (The APP sensor 1 and 2 circuit is open or shorted.)

    (The TP sensor circuit is shorted.)

  • Accelerator pedal position sensor (APP sensor 1 and 2)
  • Electric throttle control actuator (TP sensor 1 and 2)