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The 1998 Toyota Avalon OBD 2 port is behind fuse cover
The 1997 Toyota Avalon OBD 2 port is behind fuse cover
The 1998 Toyota Avalon OBD 2 port is behind fuse cover
The 1999 Toyota Avalon OBD 2 port is behind fuse cover
First try to look in the info book that came with the car, if that doesn't work see a mechanic. Or cunsult your Toyota dealer.
The PCV valve on a 1997 Toyota Avalon is located on top of the engine. It connects the left valve cover with the intake.
All fuse boxes in the Avalon have the diagram of what each fuse does on a sticker in the cover.
Remove the lower 3 screws with an Allen key wrench (they are threaded posts with an Allen key on top) , be careful they may fall into the engine never to be seen again. The center emblem can be raised slightly from the cover and unscrewed from the post below.
The oil sending unit is on the passenger side of the enginge block below the timing belt cover. You will need to remove the alternater and belt to service it.
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