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DTC Detection Logic

WARNING: This page is about a different car, the 2009 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
DTC DETECTION CONDITION CHART

DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1801 VIAS control solenoid valve 2 circuit An excessively low or high voltage signal is sent to ECM via the VIAS control solenoid valve 2.
  • Harness or connectors (The solenoid valve 2 circuit is open or shorted.)
  • VIAS control solenoid valve 2