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Engine cylinders # 1 and # 4 are misfiring

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Q: Engine codes p0301 p0304 on Toyota Sienna?
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P0301 code on a 1996 Toyota carolla?

Trouble code P0301 means:Cylinder 1 misfire detected


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Trouble code P0301 means:Cylinder no.1 misfire detected


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Engine code P0301 appears on your 2001 Nissan Frontier?

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Will engine light turn on with a bad valve?

Yes. At least one or more of these codes would come up, P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307 or P0308.


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Have you tried wires, coils or injectors?? Depending on the mileage, a compression check may be in order also. P0300 is random misfire.. P0301 refers to cylinder #1 misfire and P0306 refers to cylinder #6 misfire. Try the simple things like wires 1st... after the compression check.


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last one to touch it is at fault!! take it back & make them fix it.