Question about 2002 Jeep Liberty

3 Answers

I have a 2002 jeep liberty and the check engine light came on. I used my scan tool and pulled code p0442 minor leak in evap. system. what should I check? The vehicle runs and drives fine. I cleared it a day ago and it came on again the next day.

Posted by on


3 Answers

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • Jeep Master
  • 8,836 Answers

Check small line returning from gas tank to evap cannister for leaks, cracked hose. Also check gas cap for seal.

Posted on Sep 09, 2010

Testimonial: "very help ful info."

  • Level 1:

    An expert who has achieved level 1.


    An expert that has over 10 points.


    An expert whose answer got voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 14 Answers

Check the seal on the gas cap. make sure it is clean. no rust on the filler neck. if there is rust, clean with sand paper and coat with grease. if that is all good it could be purge solenoid.

Posted on Sep 09, 2010

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 819 Answers

There are many possible causes for this but 2 popular solutions are a bad / loose gas cap, or overfilling with fuel. there is a multitude of sensors, filters, and connections in the system that can cause the code, but these are a couple basics. many shops are equipped with a smoke machine that hooks up to the system to aid in diagnostics. good luck!

Posted on Sep 09, 2010

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

2 Answers

My 2002 Jeep Liberty check engine light comes on and experience loss of power code P1299

P1299 Engine unable to reach correct/target idle speed.

Possible causes are in most cases an engine vacuum leak.

Nov 22, 2016 | 2002 Jeep Liberty

2 Answers

Error codes p0442 and po445

Po442 is evap system leak
check intake and all vacuum hoses for leaks
check evap canister and purge valve
Po445 is evap canister purge valve short circuit
check wiring and connection

Apr 16, 2016 | 2002 Jeep Grand Cherokee Limited

3 Answers

I n my 04 Jeep Cherokee I replaced the bank1sensor1. But now I'm getting code P0442. That's an evap leak. Would my sensor i replaced with a Mopar sensor cause that to code?Did I buy the wrong sensor?

code p 0442 refers to the EVAP system--small leak detected or large leak detected === causes --hose connections , --intake leak---EVAP canister---EVAP purge valve ---mechanical fault ( cap loose or not fitted properly)hose connections ---EVAP pressure sensor
I cannot see any connection between what you did and the fault code---

Nov 13, 2015 | Jeep Cars & Trucks

1 Answer

Hyaunda 2010 check engine light code P0442

code p0442 has 2 possible fault areas

evaporative emission (EVAP) system --small leak detected===causes --hose connection/s--intake leak--EVAP canister--EVAP canister purge valve
and the second possible

evaporative emission system--large leak detected (fuel cap loose/off)===causes--mechanical fault---hose connection/s---EVAP pressure sensor

May 16, 2014 | 2002 Subaru Impreza

1 Answer

2004 jeep grand cherokee code 442/455

OBD code P0442 Small EVAP leak detected you may need to check the EVAP canister under the vehicle and the purge valve as well check for cracks on the canister or the purge valve and check all the rubber hoses connected to them foe cracks or holes. If you find any damage parts replace them. P0455 which means a large EVAP leak is sometimes referred as the gas cap leak check your gas cap and secure it tight if you still have the code change the gas cap hope this helps after you find and fix the problems get the vehicle to a shop and they will use an OBD scan tool to clear the codes.

Feb 26, 2014 | Cars & Trucks

2 Answers

P0455 and p0442

p0455-- emission control system ( a large leak ) the most common cause is a bad seal on fuel cap, remove and replace cap, if light stats on. replace cap. if not the cap it could be any where in emission system. p0442 is--same as above. Code p0442 indicates a fuel vapor leak in the EVAP control system. To fix this problem, remove and reinstall the gas cap. Clear the codes and drive to see if the codes reappear. If the code appears again replace the gas cap or inspect the system for cuts or holes in the tube or hose. good-day !

Aug 24, 2011 | 2002 Jeep Grand Cherokee

1 Answer

2003 Jeep Liberty

p0455 is evap control system no purge or large leak
p0442 is evap control system leak detected (small leak)

the cause for both could actually be a loose gas cap.

Dec 18, 2009 | 2002 Jeep Grand Cherokee

1 Answer

Troubleshooting code # 0442 on 2002 Jeep Liberty

Im guessing its a P0442. That means:
Causes of this could be a few things.
I recommend replacing the gas cap. Then take it to an auto place to get them to erase the code.
If it comes back on then...
Under the hood is a small green cap. That is the EVAP line. Follow that all the way to the gas tank and see if you see any leaks. If you do, replace/repair it.
If you dont then the only thing you honestly can do is take it to a mechanic with an EVAP Emission Leak Detector [EELD]
Good Luck!!

Nov 02, 2009 | 2002 Jeep Liberty

2 Answers

I have trouble starting my 2002 Jeep Liberty plus I have error codes P0442 &P0455. What is wrong? and how can I fix.

PO442 & PO455 are for your evap system which has to do with monitoring your fuel tank and fuel vapor system this shouldn't affect starting at all.

Oct 11, 2009 | 2008 Land Rover Range Rover Sport

Not finding what you are looking for?
2002 Jeep Liberty Logo

1,038 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jeep Experts


Level 3 Expert

79847 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Kevin Daniels

Level 3 Expert

1455 Answers

Are you a Jeep Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides