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2002 INFINITI Q45
4.5L V8•RWD•AUTOMATIC•gas
1 active safety recall on this vehicle — view recalls
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Repairs0Labor486Torque681Fluid8DTC1766Battery1Maintenance0Recalls1
P1493moderate severityPowertrain

EVAP Canister Purge Control Valve/Vacuum Switch

on 2002 Infiniti Q45 4.5L V8 · RWD

What this code means

The EVAP canister purge control valve or vacuum switch has a circuit fault. This affects vapor purge operation and emissions.

Symptoms

  • Check engine light on
  • Poor idle quality
  • Failed emissions test

Common causes

  • Faulty vacuum switch
  • Bad purge control valve
  • Damaged vacuum line
  • Wiring or connector fault

Diagnostic steps

  1. Scan for codes
  2. Inspect vacuum switch and valve
  3. Test switch signal voltage
  4. Inspect wiring and connectors
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