The previous owner had the MAF replaced before I bought it, in the past 2 months. Long term Fuel trims for both banks are still around 10%, which means it is only a matter of time before the P0171 and P0174 pop up again. I've reset engine adaptations, replaced the VVTL gaskets, replaced the o-rings on the filler neck and oil cap, checked and silicone lubricated the PCV hose o-rings, permatexed the throttle body gaskets (both sides) and cleaned the throttle body. I also permatexed the EGR itself and its mating flanges.

I can't find any pictures of a DENSO LR3 MAF. It says made in China, but Denso does have some parts made in China. Does anyone know if this is DENSO or aftermarket? Also, what is the p/n of the DENSO MAF if this is not the denso one? Thanks.

 

No....

 

Definitely no. Denso MAFs have name and part number stamped on the top

 

PHF000140

https://www.partsgeek.com/k78kjqg-la...ow-sensor.html

 

You guys are awesome.

 

Can also use a Toyota Denso MAF on these (it's the same exact part), but I'd use the parts geek one above.

Just make sure it's at least $75 though, lots of knock offs on ebay for $20. Toyota part # is 22204-22010

 

Well in fairness the knock offs can be priced high just to make people think they are legit. Just make sure you buy from a reputable seller.

 

Can confirm that Denso dropped all fuel trims. Now around 3% LTFT from 10+% before.