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Home >> Infiniti >> 2017 >> QX50 RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (3 Of 4) >> DTC / Circuit Diagnosis >> DTC P1239, P2135: TP Sensor >> DTC Logic >> DTC Detection Logic
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DTC Detection Logic

NOTE:

If DTC P1239 or P2135 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
P1239 Throttle position sensor (bank 2) circuit range/performance Rationally incorrect voltage is sent to ECM compared with the signals from TP sensor 1 and TP sensor 2.
  • Harness or connector

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

  • Electric throttle control actuator

    (TP sensor 1 or 2)
P2135 Throttle position sensor (bank 1) circuit range/performance
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