Question about 2004 Jeep Wrangler

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Small evap leak

2004 grand cherokee limited coe p0244. how am i supposed to find a small evap leak and why do i fail inspections for that. 2004 is 134a. no effect on the ozone.

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  • jpelly Oct 31, 2008

    maybe p0442

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The evap leak is short for EVARORATIVE EMISSIONS SYSTEM, NOT AC EVAPORATOR, AC leaks do not cause the truck to fail emission, most likely the problem is a defective gas cap. Also the code you give (P0244) is a watse gate code, please provide the correct code.


P0244
Turbo/Super Charger Wastegate Solenoid A Range/Performance

Posted on Oct 31, 2008

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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

1 Answer

What does code po456 means


codse p0456 refers to evaporative emission system-- very small leak detected.. probable causes -----mechanical fault---hose connections loose---EVAP pressure sensor.. I would look at the EVAP sensor as being faulty

Mar 10, 2013 | 2004 Jeep Grand Cherokee

1 Answer

How to fix obd 2 PO456 on jeep grand cherokee laredo 2002


Usually this P0456 code is caused by an incorrect or faulty gas cap. Filling the fuel tank with the engine running could conceivable cause this code as well or if the cap wasn't properly tightened. Any of the following could also be the cause:
  • A small leak in any of the EVAP hoses or fuel tank hoses
  • A small leak in the purge valve or vent valve
  • The EVAP Canister may be leaking

Oct 09, 2012 | 2003 Jeep Grand Cherokee

1 Answer

Engine light stays on code # P0456


P0456 is Evaporative Emissions System - Small leak detected.

More often than not it is a gas cap that is either not put on corrert or it has failed to hold the seal.
Less likely causes are:
  • A small leak in any of the EVAP hoses or fuel tank hoses
  • A small leak in the purge valve or vent valve
  • The EVAP Canister may be leaking

Aug 02, 2011 | 2002 Jeep Grand Cherokee

1 Answer

2003 Jeep Grand Cherokee Laredo - Code P0456 EVAP leak


open hood and ck for broken vacuum hoses going to the purge valve(2 vacuum ports and a wiring connector)
on the drivers side between airbox and firewall
if good remove driver side rear tire and inspect hoses next to the gas tank and 3rd, the canister is in that wheel well also insp for cracked hoses there also, been working for jeep 12 years i charged people about 1 hour to correct this probem.

Dec 18, 2009 | 2003 Jeep Grand Cherokee

1 Answer

P0456 OBD code just appeared on a 2004 Jeep Grand Cherokee Laredo. Filled the gas tank and erased the code, but it's reappeared a week later.


That code definition is (evaporative system small leak detected). One of the most common reasons for this code is a faulty gas cap. The evap system is strictly designed to trap fuel vapors in the tank and not allow them to scape into the atmosphere. The vehicle keeps a constant vacume on the tank and when it is unable to hold that pressure it will set the code you have. Try buying a new gas cap-thats a cheap start-clear the code and see what happens. If the light comes back on you will have to bring it to a repair shop where they will tap into the Evap system and force smoke into it. They will then observe the Evap hoses and wherever it leaks smoke will be your problem.

Dec 03, 2009 | 2004 Jeep Grand Cherokee

1 Answer

Engine light code is p0456.


EVAP Emission Control System Leak Very Small - check your fuel cap, if left loose or taken off while still running that code will appear

Nov 23, 2009 | 2004 Jeep Grand Cherokee

1 Answer

I have a 2004 Jaguar evap control system leak, codes P0445 nd Po447. I have replaced the Gas cap, but light keeps coming on. my Actron tester can send a command to test the evap system,but I don't know...


If your wanting to know what to check. po445 is the purge solenoid control circuit, po447is the evap vent solenoid control circuit.Check the connections, and the wiring for shorts, or replace solenoid. Could also be a failed pcm.

Mar 10, 2009 | 2004 Jaguar X-Type

1 Answer

2004 jeep grand cherokee codep0244 small evap leak


use carb cleaner and waft all vacuum lines and areas near evap can and when engine rpm changes you are close ...:) good luck

Oct 31, 2008 | 2004 Jeep Wrangler

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