Jeep Grand Cherokee check engine light

Firebird · 2006-04-20T22:58:05+00:00

I have a 2001 Jeep Grand Cherokee Laredo. My check engine light was on and the code being displayed is P0301, which is misfire in cylinder 1. I finally brought it to the Jeep dealer, they could not find any issues with the plugs, wires etc..So, they reprogrammed the computer, and told me if the lite comes on again then the cylinder head would require removal and possible replacement would be required...The car runs fine...except for the dumb light. DOes anyone experience this same issue also.Thanks

Apr 20, 2006 21 Replies

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I have this same problem, and I also thought it was nothing because my

97 tj sport was running fine. The p0301 just would not go away. Last week my converter flange broke loose from the manifold pipe because the flange rotted out. I figured since I have 107,000 miles on the jeep and every part of the exhaust except the converter and the two o2 sensors had been replaced, I might as well replace all of them. After cutting the converter away from the muffler I picked it up to throw it away, and antifreexe started pouring out of the converter. If I were you I would definitely get the compression test done. May save you alot of money later.

Jon