P0442 code

[offrovering]

I searched, and read.

Small leak evap system, did the gas cap thing, I cleared codes, etc.

I cannot get this code to stop reappearing! I changed with a new chrysler gas cap, still does it. 3 warm cycles does not cause it to come back, it just comes back when it wants to.

Only thing I can think of is going with a Napa gas cap that I read about on here?

Has anyone else had this issue not go away on a liberty? I realize it isnt a major issue but my wife drives it and calls me everytime the MIL goes off and gets worried the thing will blow up, I need to fix!!!

 

[JeepJeepster]

Get under your Jeep and make sure all the vacuum and vent hoses coming out of the gas tank are ok. Those are usually the ones that rot and leak over time.

 

[offrovering]

Get under your Jeep and make sure all the vacuum and vent hoses coming out of the gas tank are ok. Those are usually the ones that rot and leak over time.

woops, forgot to mention I had read that as well, and checked those. they seemed to be ok, were brittle and no deep slashes or anything of the sort. I will check again.

How hard are they to replace, is it worth tossing parts at, or should I look further?

 

[valvestem]

Did you try the battery disconnect to try to reset it?

 

[offrovering]

Did you try the battery disconnect to try to reset it?

no, dont need to, I have a scanner to erase the code. the issue I am having is that it keeps coming back on after being cleared, a few days/weeks after. I am going to maybe check the fuel lines again

 

[oldcarguy]

SYMPTOM
P0442-EVAP LEAK MONITOR MEDIUM 0.040 LEAK DETECTED

WHEN MONITORED
Immediately after a cold start, with battery/ambient temperature between 40 °F and 90 °F and coolant temperature within 10 °F of battery/ambient.

SET CONDITION
If there is a leak larger than 0.040" and smaller than 0.080" in the evaporative system.

POSSIBLE CAUSES


Evaporative emission leak detection
EVAP purge solenoid leaks/stuck open
Intermittent LDP monitor failure

 

[timmer]

Mine started as a small leak, then went to a large one.

The hoses looked OK but when I ran my hands over the hoses one felt funky.

This one:

You must be registered for see images

It's connected to the EVAP unit in the rear...

 

[valvestem]

You must be registered for see images

Maybe this diagram from a different angle will help.

 

[offrovering]

Mine started as a small leak, then went to a large one.

The hoses looked OK but when I ran my hands over the hoses one felt funky.

This one:

You must be registered for see images

It's connected to the EVAP unit in the rear...

cool, Iwill double check that again