P0442 code

taylor98v70xcharris · Post by **taylor98v70xcharris** » 22 Feb 2012, 12:55

Hello, first time poster long time reader, very helpful site. Anyway im the owner of a 98 v70xc and for the past three months iv been getting the p0442 error code. I know its a small evap leak but i was just wondering what are some things i could start checking? Iv replaced most of the vacume line (ran out of line

) and the "J" hose on the charcoal canister is fine. What else could it be?
Thanks taylor

Post by **regent** » 22 Feb 2012, 13:45

Have you looked at your filler cap - a poorly sealing cap will set an evap code. (Sorry if this sounds like an unnecessary note)

Post by **JRL** » 22 Feb 2012, 14:28

Purge valve OK?
The fastest and most thorough way is to have the car smoked for vacuum leaks

Dell+ · Post by **Dell+** » 25 Feb 2012, 05:38

I've been having the P0442 code for quite a while. I got a new OEM gas cap ($26

) and reset the check engine light. It came back in two days. I am getting it smoke tested next. Research has shown it could be: gas cap, J-hose cracked at canister (on top of fuel tank), purge valve, small leak in any vac hoses, mini hole in fuel filler neck, even a MAFS. so i am getting it smoked and will report my findings next week!

taylor98v70xcharris · Post by **taylor98v70xcharris** » 26 Feb 2012, 13:44

All great advice, thanks all. Yeah changed the gas cap and most of the vac lines and checked the "J" hose they all seem to be fine. I hope its not a hole in my filler neck, that doesnt look fun to change. What would a smoke test coust me? just an hour of labor maybe?

Jag91000 · Post by **Jag91000** » 26 Feb 2012, 19:29

about an hour of labor or so, my family's shop usually charges about 50-60 for a full smoke test.

Post by **Pauloil** » 26 Feb 2012, 19:59

you can check for vacuum leaks with carb cleaner also

Post by **matthew1** » 26 Feb 2012, 20:22

I've always been wary of this because of the heat/spark going on around the engine while spraying it. I'm no chemist, so perhaps it's unfounded. Anyone know for sure? Is propane better?

s70glt novice[Will] · Post by **s70glt novice[Will]** » 26 Feb 2012, 21:30

Hmmmmm.....I have a fog machine we used ONE halloween...I might want to try it. Any downside to sucking unknown chemical vapors into your vacuum lines?

Post by **MoVolvos** » 27 Feb 2012, 01:20

Hello,

I found this very helpful!!!!

How To Find A Vacuum Leak

Blessings,

BKM