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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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โˆ™ 2006-09-11 02:07:55
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Q: 2000 Toyota Avalon check engine light on displaying codes p300p301p306 changed sparkplugs and still dispaying codes what could be the problem?
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