DTC Detection Logic

2019 Infiniti Q70 3.7 Luxe, AWDSECTION DTC Detection Logic
WARNING: This page is about a different variant/trim than selected.
NOTE: If DTC P2135 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

P1239

TP SENSOR-B2

[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 (bank 2) circuit is open or shorted.]

    [Camshaft position sensor (bank 2) circuit is shorted.]

    (Accelerator pedal position sensor 2 circuit is shorted.)

    (Fuel rail pressure sensor circuit is shorted.)

    (Engine oil pressure sensor circuit is shorted.)

    (Power steering pressure sensor circuit is shorted.)

    (Refrigerant pressure sensor circuit is shorted.)

    (Battery current sensor circuit is shorted.)

    (Manifold absolute pressure sensor circuit is shorted.)

    [Exhaust valve timing control position sensor (bank 2) circuit is shorted.]

  • Electric throttle control actuator

    (Throttle position sensor 1 or 2)

  • Camshaft position sensor (bank 2)
  • Accelerator pedal position sensor 2
  • Fuel rail pressure sensor
  • Engine oil pressure sensor
  • Power steering pressure sensor
  • Refrigerant pressure sensor
  • Battery current sensor
  • Manifold absolute pressure sensor
  • Exhaust valve timing control position sensor (bank 2)

P2135

TP SENSOR-B1

[Throttle position sensor (bank 1) circuit range/performance]

  • Harness or connector

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

  • Electric throttle control actuator

    (Throttle position sensor 1 or 2) (bank 1)

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.