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Home >> Infiniti >> 2004 >> M45 >> Repair and Diagnosis >> Engine Performance >> Engine Control System >> DTC P1491: Vacuum Cut Valve Bypass Valve >> Diagnostic Procedure >> 4. Check EVAP Purge Line
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4. Check EVAP Purge Line

Check EVAP purge line between EVAP canister and fuel tank for clogging or disconnection.

OK or NG 

  1. OK: GO TO 5.
  2. NG: Repair it.
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