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Code PO442

Discussion in 'Stock 2002 - 2005 Explorers' started by TheFlyingTurkey, September 24, 2011.

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    1. TheFlyingTurkey

      TheFlyingTurkey New Member

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      City, State:
      Florida
      Year and Model:
      2002 Eddy Bauer 4.6 V8
      Evap Emission Control System Leak (small)

      I checked the fuel cap and it was tight.

      Anyone have any experience with this code on the 4.6L V8? Any ideas what the cause could be?

      Thanks!
       
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    3. TheFlyingTurkey

      TheFlyingTurkey New Member

      Joined:
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      City, State:
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      Year and Model:
      2002 Eddy Bauer 4.6 V8
      I did a little more searching and found this:

      http://www.obd-codes.com/p0442


      What does that mean?
      This indicates a fuel vapor leak in the EVAP control system. It means a very small leak has been detected. In fact, the leak can be from a hole as small as 0.04" in diameter. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.

      Symptoms
      You likely won't notice any drivability problems.

      Causes
      A code P0442 most likely means one or more of the following has happened:

      A loose or improperly affixed gas cap
      A non-conforming gas cap (i.e. not factory/original brand)
      A small leak/hole in a fuel vapor hose/tube
      Other small leak in EVAP system
      Faulty vent o-ring seal

      Possible Solutions
      With a P0442, the most common repair is to:

      Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back.
      Otherwise, replace the gas cap, or
      Inspect the EVAP system for cuts/holes in tubes/hoses

      Does anyone have experience with this problem?
       

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