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Home >> Infiniti >> 2017 >> QX70 AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTC/Circuit Diagnosis) (4 Of 4) >> 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 DTC Detecting Condition Possible Cause
P2138 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 2 Circuit is open or shorted.)

    [CKP Sensor (POS) circuit is shorted.]

    (EVAP Control System Pressure Sensor circuit is shorted.)

    (Refrigerant Pressure Sensor circuit is shorted.)

  • Accelerator Pedal Position Sensor (APP Sensor 2)
  • Crankshaft Position Sensor (POS)
  • EVAP Control System Pressure Sensor
  • Refrigerant Pressure Sensor