Jeep - Liberty :: 2003 - Intermittent Small EVAP Leak
Nov 12, 2011
I drive a 2003 Jeep Liberty Sport, with the 3.7 liter V6. It has roughly 97,000 miles on it.
In the year or so that I've owned it, the jeep's check engine light has come on several times. Every time I've had it checked, it's the same issue - a small evap leak, code P0442. Typically, they'll reset the computer, and I'll drive it for two or three months and eventually, the code will come up again.
Oftentimes, I'm told it could be caused by a loose gas cap. I'm aware of that and I try to make sure it's nice and tight every time I fill up. I've also looked at it, and there are no visible cracks or holes in the cap itself. But, the problem still occurs.
So, What this could be besides a loose gas cap, could cause an intermittent small evap leak?
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I've gotten the P0442 "small leak - intermittent" code and "service now" warnings on my 2007 2.0T Passat. I have also occasionally gotten the "check gas cap" warning and icon on the dash, but it always goes away quickly. The car runs fine. The VCDS scan shows as follows:
Address 01: Engine Labels: 06F-907-115-AXX.lbl
Part No SW: 3C0 907 115 S HW: 8P0 907 115 B
Component: 2.0l R4/4V TFSI 0020
Revision: --H14--- Serial number: VWZCZ000000000
Coding: 0404010A19070160
Shop #: WSC 24125 444 85663
VCID: 3041CBF8A31AF19890B
1 Fault Found:
001090 - EVAP Emission Control Sys
P0442 - 001 - Small Leak - Intermittent
[Code] ....
If I clear this code, it comes back within a day or two of driving, but not immediately. I have already replaced the gas cap and N80 valve. The other component I'm aware of possibly failing is the check valve. It's just downstream of the N80 valve, circled in red here:.
I put a vacuum on this part, and it had a very slow leak, losing about 3psi (starting from 20psi) every minute. That seems too small a leak for this to be a problem? Is this thing supposed to be absolutely air tight? Since this part is more expensive ($80) and bit more hassle to replace than the N80 valve, I'd like to know more about this before I just blindly replace it.
If this check valve isn't the problem, then what to check? Although the car runs fine, I need an inspection and would prefer to not have to clear the codes and hope for the best just before taking it in.
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My '03 Jeep Liberty developed a quite audible hole in the exhaust system overnight (sound is coming from engine compartment) and at the same time has begun missing. The missing occurs most often in the low end of gears - once through the gears (in 4th or 5th) and at highway speeds it smooths out again. My question is are these two problems related?
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I drive a 2003 Jeep Liberty with 151,000 miles on it. Since this problem concerns my cooling system, I'll give you some background info:
I bought the car with 83K. Have done coolant changes at 90K, 120K, and 150K. The last service was done immediately after my water pump crapped out. I had a new water pump installed and had the cooling system completely flushed and refilled with Mopar HOAT coolant (per manufacturer's specs).
Today, I brought the jeep in to have the spark plugs replaced and have some warped brake rotors replaced. My mechanic told me that he also found a small crack in my radiator. He said it was near the top of it. I can see evidence of fluid squirting onto the upper radiator hose - there's some white residue on there. There are no cracks in the hose itself. Just the one my mechanic found near the top of the radiator itself.
Here's my question. I'm due for an oil change in 2000 miles. I'm wondering if I can wait until the oil change is due to have him replace the radiator. Would it be smart to just buy a jug of coolant and keep an eye on the level in my reservoir and top it off with a 50/50 mix of coolant and distilled water as needed? Or should I go ahead and just have him do the radiator ASAP? I drive about 30 highway miles round trip to and from work every day.
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Following on the recent storm (Sandy) I got to my car and realized that water was leaking in from somewhere near the dashboard. Subsequently, it seems as if the electrical panel has been affected. Initially, whenever I pressed the brakes the back wiper of my Jeep Liberty (2003) would come on. That has subsequently stopped. However, now when I turn the car off the radio continues to play and I have to turn it off manually, the clock no longer goes off and the horn no long sounds when I turn on the alarm.
I took it in they hooked it up and said they couldn't see anything wrong with it. They had never seen the problem before, that they called the dealer and they had never heard of anything like that before. I have subsequently used sealant on where I think the leak originates but don't think I was particularly successful. So the problems are how do I deal with the leak and what might possibly be causing the radio, alarm problem. I should also say that I was out of town for a few days right after the problem and when I came back the car would not start so apparently there is some kind of "parasitic drain" on the car but again no-one seems to know what, where, or why.
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So I have had this code P0442 for a long time and I just kept clearing it. The attached picture (at an angle) shows the hole in the small line attached to the fuel neck filler exactly behind where the plastic wheel well cover touches it. Just ordered a new one from rockauto for about 65 shipped.
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Got a CEL tonight while driving. Originally I was driving and the light came on saying that my gas cap was loose. I corrected the problem when I got home and tightened again. The light stayed on however. I ran a scan with the OBDII and it gave me a code for EVAP- Very Small Leak .
I was reading around and some people suggested the MAF. Which would make sense because I recently had all of that stuff off and gave the engine a deep cleaning while it was exposed. I just don't see how the MAF could relate to the code my car is pushing?
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Wife's car had a check engine light this morning, code is PO456, small evap leak, I took gas cap off cleaned the filler neck and solenoid the gas cap seal, and reset the light. I filled her car up on Sunday (2011 Sonata 2.4 80000 miles). Where to go next if light comes back on? Purge valve ?
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I have a 2006 Jeep Liberty (2WD), 149k miles, that has been using a lot of antifreeze lately. I am using a full 50/50 gallon mix about once a week. I do not have any visible leaks. My heater no longer works and I was not sure if that may be a cause. The check engine light is on, but has been since I purchased the vehicle in 2012. I thought it may be a gasket, but do not see any white smoke from the exhaust. I am not hearing any strange sounds, so I am perplexed.
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My 2007 Sonata continues to throw a P0456 code, small evap leak detected, gas cap is tight, getting ready to check the evap hoses. The question I have is the evap system covered under the emissions warranty at all ?
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2009 santa fe 67000 miles. Replaced fuel senders approx a month ago. All was fine. On about the 3rd fill up the cel came on. Code was for small leak evap. checked the gas cap, no problems. Replaced the purge valve and disconnected the battery while doing so. Cel light went off and stayed off thru one tank of gas. Filled up again and thought I detected a little fuel smell shortly after and cel came on again. I only smell fuel when its full and down to just before 3/4's. The light came on right before 3/4's. My husband is beyond frustrated and wants to smash the car lol. Once I get him calmed down where should we be looking for a leak and how to fix it? We can't afford a dealership bill right now and of course it's due for inspection next month.
Code was p0456
The only answer I got in the DIY section is to check around the fuel senders again but I'm leery to do it as I can't see how there would be a leak there, the covers go on SO hard even with that tool.
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It all started with a fuel cap loose light (it wasn't) after a day or two the MIL came on and got this code I reset it but I'm sure it'll come back since there's probably a real leak. What can I check myself to find this leak?
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I have a 2004 Toyota Corolla- the CEL has been on for months- the code is for small evap leakI have tried cleaning rust from filler neck at gas cap- no change. I have had a smoke test done with no leak found.
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so my girls car is throwing an evap code (P0442) small leak detected. I bought a new oem gas cap and replaced the purge valve solenoid under the hood. that didn't work, CEL still comes on about 100mi after clearing the code.
I have checked the rubber hoses that were attached to the purge valve solenoid when i replaced it and they are fresh, no dry rot or cracks that i can see. The hose on one side goes to a hard line that runs under the car to the back, the hose on the other side of the solenoid runs under the intake to the throttle body. That hose was fine as well. Connections were tight and i even put better clamps on the hose ends that attach to the solenoid. So I have ruled out that portion of the system (under the hood).
I also removed the rear seat to access the fuel pump. All those connections seem nice and tight, I don't smell any strong gas fumes indicating a leak so i don't think the fuel pump gasket is the problem either. Finally, i checked out the hard lines running under the car front to back and I see no apparent or obvious damage. I assume my next step is to pull off the rear passenger wheel well liner and asses the charcoal canister and the LDP connections, correct??
The last thing I will mention is, Idid notice the 2 fuel lines that attach to the fuel regulator are in pretty rough shape, however not leaking any fuel. Are both of these lines actual liquid fuel lines? I am thinking one of them is a vapor return which may be part of the EVAP system. If it's dry-rotted and leaking vapors could that be the culprit??
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Threw this code p0442 evap emission control small leak. I see its a popular code to have....
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This is the code i pulled from Vag. Its not the gas cap...
VCDS Release 805.0: Generic OBD2
Mode 03: Emission related fault codes
Address 10 (Engine): 1 Fault Found:
P0456 - EVAP System: Very Small Leak Detected
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2004 VW touareg v6 - engine light on - autozone diagnosed as code P0456. Possibly gas cap, so I replaced with aftermarket gas cap from auto zone. Light still on. What can I do or replace to fix problem. I read something about a N60 or N80 valve. Is this something I can buy and replace myself. Most of my mechanical experience is related to working on a 85 CJ7 with an inline 6cyl or Chevy trucks. If the N valve is a easy fix, any instructions and pictures of how to do this.
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Okay, so a few weeks ago, my tire blew out on the freeway. Of course my spare wasn't in there and when I got one I couldn't get the lugs loosened. My 4way was too big on all sides. It was late, I am a single mother of two young kids so I had no choice but to drive slowly to get it off the freeway. The next morning I came back fully prepared, got my car in to get a new tire. I have been driving with ONE code for my CEL, but at the shop (where I use to work) I used the scanner and it threw 5 codes.
P0300 Random misfire
P0442 Small EVAP leak detected (this one was already there)
P0420 Catalyst system below threshold bank 1
P0301 Misfire cyl 1
P0303 Misfire cyl 3
My beautiful love is an 02 Jetta 2.0 4 Cyl. Now, since 4 of these codes popped up AFTER my first blowout (I turn 30 next month, knock on wood)
Did driving my car at 5 mph about a mile and a half (everywhere up until the gas station was NO PARKING) do something to my car? All of a sudden, any in town driving ESP IDLING makes my check engine light blink and my car has no power I just have to pull over wherever I am. I checked the car out myself on the side of the road and my cat was glowing. After this I do not drive my car.
So, what should I do. I did a tune up. Should I replace the 02 sensors then the cat?
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CEL came on after a couple of driving cycles showing code P0456 (evap emission control system very small leak detected)............. car drives fine has good gas mileage.....
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I had a check engine light cane on. I took it for it to get checked and they gave me this code- P0457 EVAP small leak detected. ECM has detected a large leak in the EVAP System during a system monitor test.
The paper said I had a leak in the Evap canister or hose. I took the truck to a mechanic and was told I had Bad oxygen sensors. Can Bad/Dirty oxygen sensors make this error code come up?
Exactly where the oxygen sensors are? I was told they were behind the mufflers but I didn't see any and the diagram I found was not accurate.
2002 Ford Ranger XLT v6 extra cab.
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2003 Jeep Liberty Sport, 156 K miles, Check engine light has been on for months now. First occurrence was when driving, and car started to knock as though I was shooting 50 cal machine guns. Stopped vehicle, shut off, and upon restart, engine ran smooth. Now, almost every time after engine has been running a while, and I am going on a down slope, the check engine light starts to blink, and engine starts to miss. Took to my mechanic, and so far, I have been told and have replaced, Fuel pump, Spark plugs, coils, and wires, cam sensor. Latest and most recent with promise that this has to be it, I replaced engine computer.
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