Quote:
Originally Posted by cice
Help, my 2007 4Runner V8 just threw a P0172 code and there doesn't seem to be much info associated with this code on the forum for 4th gens. Does anyone have any ideas where to start? I'm going to try cleaning the MAF and see what happens... other ideas? The 02 sensor is $164, which seems a little pricey to just replace on a wim. Other thoughts? Thank you!
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Some things to check:
Clean the MAF first, make sure you use MAF cleaner, not Carb cleaner
Engine coolant sensor
Airbox connection, if there is a leak and excess air is getting in to the MAF sensor
Clean Air filter
Best of luck, let us know how it goes.