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 P0340 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

P0340

CMP SEN/CIRC-B1

[Camshaft position sensor (bank 1) circuit]

  • The cylinder No. signal is not sent to ECM for the first few seconds during engine cranking.
  • The cylinder No. signal is not sent to ECM during engine running.
  • The cylinder No. signal is not in the normal pattern during engine running.
  • Harness or connectors

    [Camshaft position sensor (bank 1) circuit is open or shorted.]

  • Camshaft position sensor (bank 1)
  • Camshaft (INT)
  • Starter motor
  • Starting system circuit
  • Dead (Weak) battery

P0345

Camshaft position sensor (bank 2) circuit

(CMP SEN/CIRC-B2)

  • Harness or connectors

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

    (Fuel rail pressure sensor circuit is open or 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.)

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

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

    (Accelerator pedal position sensor 2 circuit is shorted.)

    (Manifold absolute pressure sensor circuit is shorted.)

  • Camshaft position sensor (bank 2)
  • Fuel rail pressure sensor
  • Engine oil pressure sensor
  • Power steering pressure sensor
  • Refrigerant pressure sensor
  • Battery current sensor
  • Exhaust valve timing control position sensor (bank 2)
  • Throttle position sensor (bank 2)
  • Accelerator pedal position sensor 2
  • Manifold absolute pressure sensor
  • Camshaft (INT)
  • Starter motor
  • Starting system circuit
  • Dead (Weak) battery
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.