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2004 jeep grand cherokee overland 4.7 v8 i got the following engine trouble codes P0301 P0442 PO456 PLS ADVISE THANKS

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  • thomas yates May 27, 2010

    thanks was a broken vaccum line by the newly installed fuel filter

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  • Jeep Master
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First code relates to a cylinder mis fire. Others are from the fuel evaporative control system. Combined they may be the result of a vacuum line on the evap system leaking and causing a lean engine condition. If you don't see anything disconnected or broken in the engine compartment or under the car, have a shop do a "smoke test" to see if anything shows up.

Posted on May 27, 2010

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1 Answer

2004 jeep cherokee overland when shifting from park to drive loud noise and idle is running rough


find noise location first. never ignore noise on machines. and 10x that on man movers. 100x that in the air.

then scan it. using any obd2 scan tool,
a tool that does Jeep factory codes. 10x that.

Apr 06, 2014 | 2004 Jeep Grand Cherokee

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2007 Jeep Cherokee won't start. Had the ignition replaced did not help. Will start every now and then.


Is there any trouble codes stored in the PCM? If so, what are they. Engine light lit?

Aug 09, 2011 | 2007 Jeep Grand Cherokee Overland

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What is firing order


Depend what Engine Model you have:
2001 - 2004 (WG) Grand Cherokee (International Markets)
1999 - 2004 (WJ) Grand Cherokee (All Markets)
WJ engine Specifications
4.0L I-6 1-5-3-6-2-4
4.7L V8 1-8-4-3-6-5-7-2
4.7L V8 HO 1-8-4-3-6-5-7-2

Sep 08, 2010 | 2001 Jeep Grand Cherokee

1 Answer

2004 jeep grand cherokee overland 4.7 v8 i got the following engine trouble codes P0301 which cylinder is causing this code?


P0301 is #1 cylinder misfire detected and is most likely related to a worn spark plug that is need of replacement. All plugs should be replaced if replacing one. Not sure how many miles you have on this vehicle, or if plugs were ever installed, but this is the basic step to take in diagnosis.

Jun 02, 2010 | Jeep Grand Cherokee Cars & Trucks

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

Camshaft position center location on 2003 jeep grand cherokee overland v8 4.7


drivers side front of the engine i believe it is on the timing cover but the camshaft tone wheel is on the left side head.

Nov 28, 2009 | 2007 Jeep Grand Cherokee Overland

1 Answer

Check engine light on 02 grand cherokee overland v8


if you live in the states... take it to an autozone they will scan the codes for free

Apr 06, 2009 | 2002 Jeep Grand Cherokee

2 Answers

I think Electric Problem


sounds like your ignition coil is faulty you may want to have it tested.

Oct 10, 2008 | 2004 Jeep Grand Cherokee

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