My check engine light came on today and the code reads P0442 My gas cap is tight and it wont go off. How do i reset it and or what is wrong with the truck? Thanks guys

 

i have the exact same problem, if you have a scanner wait until it picks up the code you can just erase it so it goes off, but in my truck it keeps comming back and the guys at auto zone are idiot and dont know what there doing so they have no idea

 

i copied this froma google search:

code P0442 most likely means one or more of the following has happened:
[ul]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 [/ul]

 

i just got mine taken care of by the dealer....i too had the check engine light on and my code was P0445, but i also would get a "tighten gas cap" warning on my dash. the mechanic told me it was the screen on the EVAP if you go off roading they sometimes will get clogged and the system can not pressurize the way it normally does. not too sure where the screen is so good luck....keep us posted on the results. aloha

 

Argon do you know where this screen is?

 

p0442 is for a vapor leak..it COULD be the evap valve(screen,as ya'll call it)..a purge solernoid,a gas cap,a leaky tank,or any line...we fill the lines with a smoke machine and look for the leak.

fun,eh?