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Re: 99 Toyota RAV4 code P0401
Posted to Technical Discussion Forum on 3/30/2007 1 Reply

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Hi Mike,

The transducer holds vacuum at the exhaust sensing port, right? You probably have a bad VSV. It'll stick open or closed sometimes. Try checking the VSV KOEOff, then check it KOEOn. It shoul... Login to read more.

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