P1450 Citroen Unable To Bleed Up Fuel Tank Vacuum

P1450 Citroen Unable To Bleed Up Fuel Tank Vacuum

Possible causes
  • Blockages or kinks in the EVAP canister tube or EVAP canister purge outlet tube (between the fuel tank, EVAP the canister purge valve and the EVAP canister).
  • Fuel filler cap stuck closed (no vacuum relief).
  • Contaminated fuel vapor elbow on the EVAP canister.
  • Restricted EVAP canister.
  • CV solenoid stuck open (partially or fully).
  • Plugged CV solenoid filter.
  • EVAP canister purge valve stuck open.
  • VREF circuit open (harness near FTP sensor, FTP sensor or PCM).
  • Damaged FTP sensor.
    • Symptoms
    – Engine Light ON (or Service Engine Soon Warning Light)
    P1450 Citroen Description

    Monitors the fuel vapor vacuum and pressure in the fuel tank. System failure occurs when the EVAP running loss monitor detects excessive fuel tank vacuum with the engine running (but not at idle).

    Citroen Vehicle:2013 Citroen,2012 Citroen,2011 Citroen,2010 Citroen,2009 Citroen,2008 Citroen,2007 Citroen,2006 Citroen,2005 Citroen,2004 Citroen,2003 Citroen,2002 Citroen,2001 Citroen,2000 Citroen,1999 Citroen,1998 Citroen,1997 Citroen,1996 Citroen,