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2007 INFINITI FX45
4.5L V8•AWD•AUTOMATIC•gas
4 active safety recalls on this vehicle — view recalls
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Repairs0Labor476Torque2094Fluid7DTC1900Battery1Maintenance0Recalls4
P1491moderate severityPowertrain

Vacuum Cut Valve Bypass Valve

on 2007 Infiniti FX45 4.5L V8 · AWD

What this code means

The vacuum cut valve bypass valve in the EVAP system is not working correctly. This affects fuel vapor control and can trigger the check engine light.

Symptoms

  • Check engine light on
  • Fuel odor
  • Failed emissions test

Common causes

  • Faulty bypass valve
  • Vacuum hose leak or blockage
  • Wiring or connector fault
  • Damaged EVAP canister

Diagnostic steps

  1. Scan for stored codes
  2. Inspect vacuum hoses and connections
  3. Test bypass valve operation
  4. Check wiring and connector continuity
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