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Home >> Nissan-Datsun >> 2014 >> Sentra S, Standard Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (Diagnostic Codes & Symptom Tests) >> 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