fuel air ratio sensor

I found these two PriusChat posts doing a quick Yahoo search. I think this is what you're asking. You can do your own YouTube, photo search. It's easy:

1. Mounted on the front of the throttle body, just below the air cleaner. If you take the air filter out, and look down the throttle body throat, you'll see the MAF sensor poking in from the front. It's held on by two screws, located in the perfect position to prohibit use of normal-sized screwdrivers for easy removal. Many others recommend just buying a spray can of MAF sensor cleaner and spraying it from the top, without removing it

2. Remove the sensor and carefully wiped it with a soft toothbrush and isopropyl alcohol...

 

I believe the OP wants to replace the air/fuel ratio sensor which is located in the exhaust system, upstream from the catalytic converter. Another poster recently commented on this as well as the need to machine the oxygen sensor socket to fit into the available space. I recommend the OP do a Prius Chat search.

It will also probably be necessary to remove some passenger cabin trim in order to access the A/F ratio sensor's wiring harness connector located inside the vehicle.

If all else fails, the Toyota repair manual documentation can be accessed at techinfo.toyota.com which is a subscription website.

 

Finding the right socket is a PITA. You can spend $78 for the Toyota special tool, or buy the $10 one at Autozone and grind it down until it fits inside the collar.

http://priuschat.com/forums/gen-ii-...ting/89967-oxygen-sensor-collar-around-3.html

 

fuel air ratio sensor - pricing and part sources? Dealer Warranty?

Anyone know where to buy this part and have they tried it on their car? Ebay sells them, but not sure they'll work right.

What's the warranty on these from Toyota (Calif)? I think they're part of the emissions system, but not sure if they're covered for as long as the rest of the emissions system.