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    jdb123's Avatar
    jdb123 Posts: 3, Reputation: 1
    New Member
    		  
    #1

    Sep 5, 2007, 05:22 PM
    Mazda b4000
    I need help.
    My 1998 mazda b4000 repeatedly sets a code indicating massive evaporative emission
    Control leak.I have replaced the gas cap.and the hose from the check valve assy.to
    The throttle body.It resets the code about every three days.
    Does this system have a charcoal canister?I went a local ford dealer and they could not
    Locate it.
    CaptainRich's Avatar
    CaptainRich Posts: 4,492, Reputation: 537
    Cars & Trucks Expert
    		  
    #2

    Sep 5, 2007, 07:26 PM
    Can you tell me the massive code
    I can look it up
    P0442 is quite common
    P0446 also
    jdb123's Avatar
    jdb123 Posts: 3, Reputation: 1
    New Member
    		  
    #3

    Sep 6, 2007, 02:44 PM
    Quote Originally Posted by CaptainRich
    Can you tell me the massive code
    I can look it up
    P0442 is quite common
    P0446 also
    The scan code is P0455
    Definition : EVAP large leak detected.

    Thanks for the reply
    Don
    CaptainRich's Avatar
    CaptainRich Posts: 4,492, Reputation: 537
    Cars & Trucks Expert
    		  
    #4

    Sep 6, 2007, 02:49 PM
    Quote Originally Posted by jdb123
    The scan code is P0455
    Definition : EVAP large leak detected.

    Thanks for the reply
    Don
    P0455 is comomonly referred to as "the gas cap code"
    When the Evap system attempts to draw collected vapors from the canister, the vacuum necessary cannot be achieved because of a poor seal at the fuel fill cap.

    I'd recommend a new gas cap and drive the car. The light will go out by itself or you can take it to have the light turned off
    jdb123's Avatar
    jdb123 Posts: 3, Reputation: 1
    New Member
    		  
    #5

    Sep 6, 2007, 03:23 PM
    I replaced the gas cap first thing.It is an after market part not from ford/mazda though.
    I cleared the code and it reset three days later.Every time I have reset it ,it reappears at appoximately the same time {morning}on the third day on my way to work.I drive thirteen miles and it sets about 3/4s of the way there.
    Seems strange but true.
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