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06 liberty both codes P0440 and P0302 any ideas? #2444242
01/31/18 09:21 PM
01/31/18 09:21 PM
Joined: Jun 2003
Posts: 13,878
Willow Grove PA
71sat440 Offline OP
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71sat440  Offline OP
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Posts: 13,878
Willow Grove PA
It was throwing code P0440 a couple weeks ago, I made arrangements to take it in then it went out by itself and was gone. Dash light came on yesterday and now its throwing both codes.
Any ideas?

Re: 06 liberty both codes P0440 and P0302 any ideas? [Re: 71sat440] #2444326
01/31/18 11:13 PM
01/31/18 11:13 PM
Joined: Feb 2003
Posts: 2,138
tucson az
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frank Offline
top fuel
frank  Offline
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Joined: Feb 2003
Posts: 2,138
tucson az
Per my 06 Liberty FSM:

P0302 - Misfire detected cylinder #2
P0440 - General evaporative system failurer

Re: 06 liberty both codes P0440 and P0302 any ideas? [Re: 71sat440] #2444478
02/01/18 04:08 AM
02/01/18 04:08 AM
Joined: Jan 2003
Posts: 13,546
md
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mopars4ever Online content
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md
My relative had the evap leak and it was the fuel pump cracked on the top.

Re: 06 liberty both codes P0440 and P0302 any ideas? [Re: 71sat440] #2444672
02/01/18 03:05 PM
02/01/18 03:05 PM
Joined: Jan 2003
Posts: 20,645
So Near, Yet So Far
topside Offline
Too Many Posts
topside  Offline
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So Near, Yet So Far
Codes should stay in memory so they can be retrieved & investigated.
Misfire could be tired plug or wire, maybe dirty injector; evap leak could be loose gas cap, cracked hose, etc.

Re: 06 liberty both codes P0440 and P0302 any ideas? [Re: 71sat440] #2444675
02/01/18 03:12 PM
02/01/18 03:12 PM
Joined: Dec 2009
Posts: 20,600
in a cattle trailer down by th...
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Guitar Jones Offline
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in a cattle trailer down by th...
Chrysler products are well known for evap and purge system hoses rotting away. Check every piece of rubber hose in those systems first.


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'92 D250 Club Cab CTD, 47RH conversion, pump tweaks, injectors, rear disc and hydroboost conversion.
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Re: 06 liberty both codes P0440 and P0302 any ideas? [Re: 71sat440] #2444882
02/01/18 09:56 PM
02/01/18 09:56 PM
Joined: Jun 2003
Posts: 13,878
Willow Grove PA
71sat440 Offline OP
I Live Here
71sat440  Offline OP
I Live Here

Joined: Jun 2003
Posts: 13,878
Willow Grove PA
Today I was told it was the purge valve, got one on order from Jeep for $65. Parts store had one that was $110 in stock, or Dorman that was $55 but would take 2 days. Jeep will have tomorrow. I remember on our 2001 T@C all the little pieces of hose were rotted under the battery tray.

Re: 06 liberty both codes P0440 and P0302 any ideas? [Re: 71sat440] #2444905
02/01/18 10:44 PM
02/01/18 10:44 PM
Joined: Jan 2003
Posts: 2,252
New York
rarefish Offline
top fuel
rarefish  Offline
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Joined: Jan 2003
Posts: 2,252
New York
I had the evap code on my 01 Dakota some years back and I had several hoses that had starting to crack right where they are terminated. The code came back a second time later and the caused this time was a corroded fuel filler neck.
Also a common problem in the salt belt Northern states.







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