P0442- evap sys leak -Update Possible causes found????

Jeep4me99 · **Posted:** Thu Jul 23, 2009 5:14 pm

have a evap system medium leak code popping up. Already did the gas cap trick and it didn't work. Any ideas as to where to start tracking down the leak?

THanks

KJNick · **Joined:** Mon Jul 11, 2005 12:00 pm **Posts:** 56

After a significant amount of searching, I ended up taking mine to the dealer to track down. They found multiple leaks on the hoses for the evap system.

Lee

sprsonic · **Posted:** Thu Jul 23, 2009 7:56 pm

check for split/cracked hoses around purge solenoid, where the plastic hoses travel down the firewall and at the front side of the fuel tank before taking it anywhere, thats the majority of evap leaks that i've seen.

Jeep4me99 · **Posted:** Thu Jul 23, 2009 9:28 pm

coo beans. I'll check it out this weekend. Anyone know where to get the replacement hoses if thats what is needed?

jeepkj02 · **Posted:** Thu Jul 23, 2009 9:43 pm

Any auto parts store should have vacuum hoses.

sprsonic · **Posted:** Fri Jul 24, 2009 8:02 am

i usually replaced them with a reinforced hose such as a fuel hose. the hose that chrysler used is not thats why it cracks and splits.

Jeep4me99 · **Posted:** Fri Jul 24, 2009 3:58 pm

I found two possible causes. One is the hose from the top of the throttle body that goes to ???. Its a short 90 degree bend hose has cracks. Another is the rear axle breather tube is split pretty bad where it connects the axle. Not sure the last one could be the cause, or the first one for that matter. but I'll replace them and give it a shot.

Jeep4me99 · **Posted:** Fri Jul 24, 2009 5:53 pm

replaced both hoses and the code went away. Got about 6" extra for the rear axle breather to compensate for the lift and droop on that side when on the trails. All is good. Thanks bros.

yakers · **Posted:** Sat Jul 25, 2009 12:16 pm

Glad you found your problem & fixed it. On my 98 XJ I had that code coming up and took it to the dealer. They could not find a problem and advised it must be a bad sensor which would cost more to fix than an actual problem. Fortunately this was an intermittent problem and did not come up on my CA smog test. I just drive it and clear the code out occasionally.

sprsonic · **Posted:** Sat Jul 25, 2009 3:45 pm

brucebotti · **Posted:** Sat Jul 25, 2009 11:28 pm

I had a similar problem on my wife's 2001 300M. I ended up taking the gas tank down and there was a small 1/4 vacuum hose that was split. It was nice having a $.25 repair (my labor is worth $0). It would have been close to $1000 at a dealership.
Just my $.02.
Bruce

2003renegade · **Posted:** Wed Aug 05, 2009 8:24 pm

ima have to check my hoses. i have that same code

Blue KJ in PA · **Posted:** Wed Aug 05, 2009 8:41 pm

On my KJ it was the small rubber hose at the union of plastic hose near the gas tank and one union up under the hood near the rear of the engine that had dry rotted and cracked.

2003renegade · **Posted:** Thu Aug 06, 2009 7:52 pm

easy to replace?

Blue KJ in PA · **Posted:** Thu Aug 06, 2009 8:54 pm

Yeah...pulling the old off is the hardest part...got a piece of reinforced fuel hose, cut to size and clamped on.

2003renegade · **Posted:** Tue Aug 11, 2009 11:38 pm

fixed it!! yaya i had a couple bad hoses.

P0442- evap sys leak -Update Possible causes found????

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