Where is the PCV Valve located?

BEJOE95

MEMBER
2003 MERCURY SABLE
3.0L
6 CYL
2WD
AUTOMATIC
142,000 MILES

My CEL came on, so I took it to AutoZone to have it scanned, it came back with codes P0174 and P0171 and a suggested fix for replacing the PCV valve. I have no idea where to even begin looking for this thing, and Google isn't helping so now I come here. I am not mechanically inclined in the slightest, so any assistance would be greatly appreciated!

Edit to add: This is the 24 valve DOHC engine, according to the plate dealy on the engine.

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
47,320 POSTS

Here is information on the codes:

P0174 - System Too Lean (Bank 2):

P0171 - System Too Lean (Bank 1):

This guide can help as well:

https://www.2carpros.com/articles/repair-lean-mixture-codes-p0171-or-p0174-on-some-manufacturers

Here is the location of the PCV valve. Check out the images (below). Please let us know what happens.

Image (Click to make bigger)

SPONSORED LINKS

Was this

answer

helpful?

Yes

No

Saturday, June 3rd, 2023 AT 11:09 AM

BEJOE95

MEMBER
2 POSTS

Thanks for the response, Ken! I went and had a look under the hood, and it seems the hoses indicated in the picture you provided are just vacuum lines. At least the one in the front is, I don't know about the one in the back because I would have to dismantle a big something-or-another in the way.

Was this

answer

helpful?

Yes

No

Sunday, June 4th, 2023 AT 10:55 AM

KEN L