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Re: 1999 Toyota Tacoma SR5 Pickup 3.4L 4x4 - P0171
Posted to Technical Discussion Forum on 3/14/2007 1 Reply

Hoi,

Usually a p0171 or p0174 are not the O2 sensors.

On your next one I would first clean the MAF , Then recheck fuel trim values.

Eirc Login to read more.

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