2000 f250 o2 sensors
 

Hi, just wondering how many o2 sensors are on my truck. i only see one, and its pre-cat, but the parts store says theres 4!! he said 2 pre cat and 2 post cat, but i am sure there arent any post cat

thanks

btw 5.4L, 5 spd, supercab short box if that makes a difference

Good question! on My 00 F250 Duty it has no cats (as i bought it that way) and i have been wondering about O2 sensors on or after the cats; (if any) as well. wish i could help but i am in the same boat, well truck!!

With a 5.4l you have at least 2 O2 sensors, one on each side after the exhaust manifold, before the y-pipe and cat. No rear sensors on my 99 either...

O2
 

I'm not 100% sure but some states are stricter than others, so it may depend on where the vehicle was sold originally. example (California dealer)?

Update to my last post..

For any one still looking for how many o2 sensors they should have, see:

https://www.ford-trucks.com/forums/3...n-sensors.html

some 2,some 4