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Home >> Infiniti >> 2015 >> QX80 Base, AWD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostic Trouble Codes (DTCS) P1551-P219B, Symptom Tests And R & I) >> DTC/Circuit Diagnosis >> DTC P2138: App Sensor >> DTC Logic >> DTC Detection Logic
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DTC Detection Logic

NOTE:

If DTC P2138 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643. Refer to  DTC LOGIC  . 

DTC No. Trouble diagnosis name
(Trouble diagnosis content)
DTC detecting condition Possible cause
P2138 APP SENSOR
(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 connectors

    (APP sensor 1 or 2 circuit is open or shorted.)

    [CKP sensor circuit is shorted.]

    [CMP sensor (bank 1) circuit is shorted.]

    (Battery current sensor circuit is shorted.)

    (Refrigerant pressure sensor circuit is shorted.)

    (EVAP control system pressure sensor circuit is shorted.)

  • Accelerator pedal position sensor (APP sensor 1 or 2)
  • Crankshaft position sensor
  • Camshaft position sensor (bank 1)
  • Refrigerant pressure sensor
  • Battery current sensor
  • EVAP control system pressure sensor