Evaporative Emissions Diagnostic Trouble Code Definitions

2004 Ford Econoline E150, Van Cargo, 4.6 WSECTION Evaporative Emissions Diagnostic Trouble Code Definitions
WARNING: This page is about a different car, the 2002 Mercury Villager. However, it is still accessible from the selected car via links, so may be relevant.
EVAPORATIVE EMISSIONS DIAGNOSTIC TROUBLE CODE DEFINITIONS

DTC Description Go To Test
P0440 Small Leak Detected In EVAP System AΒ 
P0455 Gross Leak Or No Flow Detected In EVAP System BΒ 
P1440 Very Small Or No Purge Flow Detected In EVAP System BΒ 
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.