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1999 NISSAN CEFIRO
3.0L V6 VQ30DE•RWD•AUTOMATIC•gas
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Repairs0Labor490Torque416Fluid8DTC1706Battery1Maintenance0Recalls0
P1490low severityPowertrain

Vacuum Cut Valve Bypass Valve Circuit

on 1999 Nissan Cefiro 3.0L V6 VQ30DE · RWD

What this code means

Electrical fault in vacuum cut valve bypass valve circuit.

Symptoms

  • CEL
  • EVAP issues
  • Failed emissions

Common causes

  • Open/short in wiring
  • Faulty solenoid
  • Corroded connector
  • Faulty ECM

Diagnostic steps

  1. Test circuit resistance
  2. Inspect wiring
  3. Check connector
  4. Test ECM output

Repair notes

Repair wiring or replace valve.

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