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Chris (aka-Moose)
Chris (aka-Moose), Auto Technician
Category: Toyota
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Experience:  16 years of experience
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Sienna: i have 04 sienna muptipple cylinder misfire po300,

Customer Question

hi i have 04 sienna muptipple cylinder misfire po300, po301,po302, po303, po304, po305, please help
Submitted: 1 year ago.
Category: Toyota
Expert:  Jared D replied 1 year ago.
Do you have a scan tool that will monitor the fuel trims?It seems like you have replaced just about everything but the oxygen sensors. It's possible that you have an O2 sensor that is messing with the fuel trims. You will need a good scan tool to tell for sure.

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