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Toyota P0171 System too lean on 3.4L (5VZ-FE)
Posted to Technical Tips Forum on 4/13/2002 1 Reply

Good evening TTF,

I have seen several of these Codes this past week. They were set on three 1999 4 Runners and one 2002 Tacoma all with the 3.4L (5VZ-FE) engine. The Tacoma actually had a Nat stuck on the wires. The Air Filters all looked to be in fair condi... Login to read more.

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