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2004 PT PO301 code issues

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Old 25 Mar 2012, 10:59 am
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Join Date: Mar 2012
Location: Dublin Ca.
Posts: 1
Default 2004 PT PO301 code issues

Hello, I have been having a lot of issues with this code (po301) I have replaced all wires, coil pack, plugs and now the injector for number 1 cylinder. It keeps coming back within 24 hours of repairs. What else can be causing this missfire in cylinder 1?
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Old 19 Apr 2012, 11:33 pm
ptcruisindad's Avatar
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Join Date: Feb 2011
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Default Re: 2004 PT PO301 code issues

Hello, Sorry for the long time to reply to you. I am having the same problem with my '05 PT Cruiser. I'm getting a PO 301 code. I tried switching the no.1 plug and the no. 4 plug wire. it fixed the problem for about a day, and it started doing the same thing all over again, and got a PO 301 Code. I checked the plugs, and they are fine . I am told that the Coil pack on the PT's go bad ,and the time they go bad veries, so you might want to experiment ,as I did by switching the plug wires and seeing if the problem code travels with it to the No. 4 cylinder,thaen check the condition of your plugs,and then more than likely it's probably the ignition coil that sits on top of the valve cover. once you remove the exhaust manifold blocking the valve cover it's a piece of cake to get to! you can also take it to an auto part store and have them test it for you. Pep Boys sell a BWD ignition coil for around $67.00 a bit cheaper than o'reilly's and Auto zone. Good Luck!
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Old 20 Apr 2012, 07:42 am
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Default Re: 2004 PT PO301 code issues

ptcruisindad, your the first to come to the forum with a bad coil pack. In all the other problems with a cylinder misfire code, it's always come down to something else other than the pack. I'm not saying there isn't a bad one, and you proved that, but 9 out of 10 times the misfire is something else.

2004kc, like Dad said, move the plug or wire to a different spot and see if the code changes. If not, you either have a vacuum leak on the manifold somewhere or you might have an internal problem and a compression check is needed. Owners have found small cracks along the seam of the upper manifold around the area of the offending misfire or where the upper and lower parts of the manifold come together.
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