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Old 10-11-2016, 11:55 AM
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2011 wk2 p0306

Hey guys,

I had a P0128 code come on (thermostat) and took it to my independent mechanic. He replaced the thermostat and did a coolant flush.

After I drove away check engine light came back on. I put the scanner on it again and sure enough the thermostat code was still flashing, but also a P0306 cylinder 6 misfire.

I took it back and they cleared the codes again and replaced the spark plugs. Now the code has come back on. I have no idea how or why the P0128 code would still flash after it was supposedly fixed. But the cylinder 6 is troubling. It could be the coils I suppose, or could be the X56 extended warranty on the cylinder head issue.

Has anyone had this experience? My jeep only has 78k on it and this is not making me feel good about keeping the jeep.

Thanks!

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Old 10-11-2016, 09:29 PM
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Re: 2011 wk2 p0306

Sorry to hear. Good luck. Dealer visit?
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Old 10-13-2016, 07:43 PM
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Re: 2011 wk2 p0306

So went to the dealer. Cylinder 6 misfire was due to cylinder head needing replacement. This falls under the X56 extended warranty FYI.

https://customerconnect.custhelp.com...ail/a_id/24676

Hope this helps anyone who experiences similar problems down the road.
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