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Home >> Infiniti >> 2015 >> QX60 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 40 (Engine Control System (DTC/Circuit Diagnosis) (VQ35DE) (Except Hybrid) (1 Of 3)) >> DTC/Circuit Diagnosis >> DTC P0078, P0084: EVT Control Solenoid Valve >> DTC Logic >> DTC Detection Logic

DTC Detection Logic

WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
DTC No. Trouble diagnosis
(Trouble diagnosis content)		 Detecting condition Possible cause
P0078 EX V/T ACT/CIRC-B1
[Exhaust valve timing control solenoid valve (bank 1) circuit]		 An improper voltage is sent to the ECM through exhaust valve timing control solenoid valve.
  • Harness or connectors

    (Exhaust valve timing control solenoid valve circuit is open or shorted.)

  • Exhaust valve timing control solenoid valve
P0084 EX V/T ACT/CIRC-B2
[Exhaust valve timing control solenoid valve (bank 2) circuit]
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