2014 5.4 Oxygen sensors- How many and where exactly?

[Yoop33]

Im having a hell of a time finding what im looking for. Originally I thought a single sensor would be found towards the back of the exhaust and Ive followed it almost the to headers and can't find it.
Now I read there could be and most likely is more than one.

Any help, especially a schematics PDF would be awesome.

 

[1955moose]

Theirs 4, 2 upstream, 2 downstream. Your not looking hard enough.

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[TobyU]

The upstream are often way up high closed to engine almost in vertical rise section by firewall.
The downstream are usually easier to see and in pip running toward rear around front of front door area.

 

[scythefwd]

Cant say on the 5.4L, but on my 4.6 f150.. one was in the exhaust manifold, the other was right after the cat. There will always be 2 per bank of cylinders. One pre cat, one post cat. The difference in measurements between the two is what tells the engine to adjust its air fuel mixture or timing on variable timing engines. If you cannot find them chasing the exhaust.. there is a slim possibility you have an exhaust and tune that involved a cat/o2 sensor delete. Either way.. if you cannot find them.. look at where they plug into.. they'll be topside usually.. and pretty much any maintenance manual worth its salt will have them labeled (as well as on the exhaust path too)

 

[talonfxr]

2 for the left side between exhaust and drivers floor pan same for the passenger side. easiest thing is to follow the wires going towards your exhaust in those areas. Just replaced bank 2 sensor 1 (left side forward), took about 15 mins. The space is tight and you'll have to use an open ended wrench if I remember correctly it was 7/8" in size.

 

[Mad Oshea]

$. One is in the Y of the tail pipe where they split. two forward and one final. All on the top. You will have to feel on the top of the pipes to find three of them. the two in the front a a pain.

 

[Yoop33]

Thanks for the help guys.... Turns out the problem I was looking to solve had nothing to do with O2 sensors like many reports said...