Question about 2004 Jeep Grand Cherokee

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2004 Jeep Grand Cherokee - Inline 6 - Error Code P0442

Is this most likely a faulty gas cap? Will autozone be able to tell me if it is internal or external? If it is internal is there anything I can check myself to ensure I am not getting ripped a shop?

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  • Tbuff Dec 19, 2008

    I had it checked at Autozone as well. The code came back and a mechanic friend says Jeeps were notorious about vacuum lines becoming brittle. I have not searched for any hoses yet.

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Yes autozone can tell you what the code means wether it is internal or external

Posted on Dec 12, 2008

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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

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

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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

Does V6 Cherokee Larado have a timing chain or belt?


First off, if you have a 2004 Grand Cherokee with the 4.0 liter 6 cylinder engine, then it is an inline 6 rather than a V-6. To answer your question, it has a timing chain.

Dec 14, 2009 | 2004 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

I have a 2001 Jeep Grand Cherokee - Limited My


That's a generic O2 sensor circuit overvoltage warning. Did they find any additional codes? Also, did they clear the code for you? Your car is an OBD2-emissions car, meaning you'll have an O2 sensor before and after each catalytic converter. Is your engine the V8 or the inline 6? If it's the V8, you'll probably have four (although it could be two or three) O2 sensors. If it's the inline 6, you likely only have two. I'm asking about additional codes because that one doesn't help narrow down which sensor is bad. Have you noticed your gas mileage dropping at all? Or a buildup of black carbon soot in the tailpipes? Maybe less power than usual? If so, it's probably a primary (pre-cat) O2 sensor. Those are the ones that determine how much fuel the engine will be fed. If you don't have any discernable difference at all, it's probably a secondary sensor (post-cat). The issue I have is, either of those should throw at least one additional code (either to indicate which sensor is going bad, or in the case of a secondary sensor, you'll usually see a "catalytic converter below threshold" or similar code, since the secondary sensors are used by the computer to see how well the cats are working).

Any additional codes in there, or symptoms you can describe?

Nov 11, 2009 | 2001 Jeep Grand Cherokee

1 Answer

2004 jeep grand laredo MIL(malfunction indicator light)


Yes it can be caused by low quality fuel, and your gas cap not being installed properly. Best bet is the gas cap, so take it off and screw it back on. Then take your vehicle to autozone and hook up diagnostics to clear your MIL.

Sep 06, 2008 | 2004 Jeep Grand Cherokee

1 Answer

Code 53


Hello yeremya1776,

For Jeep Grand Cherokee, 1991-95 models:

Code 53 - Internal Controller Failure - Internal engine controller fault condition detected during self test

Hope this helps.

Remember: Good things come to those who Rate!!

Mike

Aug 06, 2008 | 1995 Jeep Grand Cherokee

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