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Home >> Nissan-Datsun >> 2016 >> Sentra S, Standard Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTC/Circuit Diagnosis) (3 Of 3) >> DTC/Circuit Diagnosis >> DTC P1800: Intake Manifold Tuning Valve >> DTC Logic >> DTC Detection Logic
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DTC Detection Logic

DTC No. CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition Possible cause
P1800 VIAS S/V-1
(Variable intake air system control solenoid valve-1)
An excessively low or high voltage signal is sent to ECM through the intake manifold tuning valve.
  • Harness or connectors

    (The solenoid valve 1 circuit is open or shorted.)

  • Intake manifold tuning valve