2007 toyota rav4 code p0171

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Shane

HI Shane, it's nice to meet you. Is this a 6 cylinder or 4? Also, have you done anything to resolve it as of yet?

I replace the [spark plugs](/topics-spark-plug-toyota/) air mass flow sensor gas cap evap sensor4 cylinder

Does the [engine](/topics-engine-toyota/) run rough at all or just the pesky code?

Run rough wen u pull out to pass it juke an slow down a lil befor it go

Ok, thanks I would check for vacuum leaks to begin with. With the engine running at idle, spray some carb cleaner along the intake manifold and any other vacuum lines you see. If the idle speed increases or smooths out, then you have a vacuum leak. If not, then I would suggest checking the fuel pressure, you will need to get a gauge for that, and if it's good, the front O2 sensor is the likely issue. The fuel pressure may be the issue based on the hesitation you are getting when you pull out to pass.

Did that its goodI replaced the o2 alreadyThing on taking the tank out

Whats the fuel pressure reading?

Have not test it yetIf its low wen I test it the pump right

Yes, it should be in the 45-55 psi range.

Ok thanks I let you know

Sounds good. Thanks