Question about 2004 Jeep Liberty

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What's your problem? p0301 on 2004 Jeep liberty changed sparked plugs

Changed spark plugs now has new cod PO301

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Check here to see code.

Posted on Dec 30, 2012


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Posted on Jan 02, 2017

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SOURCE: 2002 Jeep Liberty 3.7 with a Cylinder 2 misfire.

check the fuel injector in most cases when the number 1 injector goes bad the other injector have the tendency to misfire. Also you need to check the fuel pressure to see if is to low due to a dirty filter.

Posted on Apr 25, 2012

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SOURCE: 2002 Jeep Liberty Prolonged Cranking problem

Fuel pump: The engine may crank several seconds before starting due to loss of fuel pressure caused by a bad check valve in the fuel pump assembly. (2002 models)

Posted on Oct 28, 2008

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SOURCE: 03 Jeep Liberty random misfire

try checking your ignition coils and also the power wires to them!!Hopefully this helps....

Posted on Jul 15, 2009

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SOURCE: 2007 Jeep Liberty 3.7L engine

the dash lights will not come on and now my right parking light is out and i replaced the bulb and still nothing. HELP PLEASE

Posted on Jul 31, 2009

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SOURCE: How to change spark plugs on a 2003 jeep liberty?

The plugs are probably under the coil packs, You will see a series of wiring harnesses with 3 or 4 wires in each connector that plug into a square or rectangular piece that is usually bolted down to the center of the valve cover(s). You have to remove these and the plugs are under them. Be gentle with the harness conectors and take your time as the underhood temps tend to make them brittle

Posted on Sep 18, 2009

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2004 JEEP LIBERTY KEEPS COMING UP #6 cyc miss fired.

When I had a misfire and could not find the problem, I would drive my car at night to an area where there were no lights near by. I would leave the engine on and open the hood. You can see if there is any arcing from from your spark plug wires or any electrical wiring to the engine block. Also, you may want to consider this: How long has it been since the spark plug wires were changed?

Jul 01, 2014 | 2004 Jeep Liberty

1 Answer

I got a 2001 Oldsmobile aurora that the code reads PO301

well that code means ur have a missfire in cylinder one change the wires for the spark plugs that really the only thing i can think off beacuse you have already done the spark plugs and the oxygen sensors and the coil packs

Feb 26, 2013 | 2001 Oldsmobile Aurora

1 Answer

Cod p0304 jeep liberty 2001

this is a code for misfiring ( cylinder #4). you need to reset engine computer first. you can do this by removing negative cable from battery and waiting for 15 minutes. if there is save your radio code.

if it returns back, faulty cable for spark plug, old spark plugs, coil(s) may cause this. replace spark plugs first(it is the chepaest fix). mostly you can cure problem by this way. if not your oxygen sensor can cause this. you can understand this by running engine and observing how it idles and how it smells at back. if it start to idle rough and start to smell bad ad exhaust pipe. o2 sensor is gone.

you need to proceed step by step. 1 variable at a time please.

in extreme cases burned exhaust valve,or broken ECU can casue this too.(very rare)

Nov 21, 2011 | 2003 Jeep Liberty

1 Answer

Changed the spark plugs to E3's about a day later the engine started to idle rough and now the check engine is on

Sounds like bad plug wires, and/or one or more wires may not have been clipped back on all the way and came off. Old plug wires do not like being disturbed.
With plug wires, its the age, not the miles. Spend the money for wires from a Jeep dealer. You'll thank me. Hope this helps.

Aug 17, 2011 | 2006 Jeep Liberty

3 Answers

How do i perform a tune up on a 2003 jeep liberty sport V-6 2WD do i just replace the spark plugs because I haven't worked on a jeep before please help?

That is about it, Spark plugs are rare, they go 100,000 miles, plus, now days, air filter, oil, belts, fluids. Belts get checked, but only get replaced at 60,000. That is about it. Hope this helps.

Jul 11, 2010 | Jeep Liberty Cars & Trucks

1 Answer

03 Jeep Liberty random misfire

try checking your ignition coils and also the power wires to them!!Hopefully this helps....

Jul 15, 2009 | 2003 Jeep Liberty

1 Answer

Where are the spark plugs on a 2004 jeep liberty?

Many new cars have internal"spark plugs", kinda like the glow plugs on a diesel motor. Look in you manuel and they might have written some kind of explanation. My friends 2001 Ford F-150 truck has no spark plugs and it baffled us until we knew the answer, They just didn't have any

Jul 11, 2009 | 2004 Jeep Liberty

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