Looking for the PCV valve on my 2015 Fiesta S

[Cheryl Lyne]

I think my car is a mutant. We've been trying to find the pcv valve so we can replace it. But despite checking YouTube, etc, we can't find where it's located. There are videos that show someone replacing the valve on a 2015 Fiesta but the engine doesn't look like mine. Any ideas? Thanks.

 

[Handy Andy]

Which video? Else we may need a photo of your motor and if it's like ours, we can point it out to you.

It's a tedious job to remove it and replace it, for you have to take out the intake manifold to obtain access to that valve and its assembly.

A Thread (or several) on it is found here...
https://www.fordfiesta.org/threads/so-i-have-a-very-small-oil-leak-blown-head-gasket.8827/post-23922
https://www.fordfiesta.org/threads/yet-to-be-named-2016-fiesta-se.8636/post-22759

 

[Cheryl Lyne]

I'll take a picture of my engine tomorrow. Brother replaced the manifold absolute pressure sensor and cleared the code so we are waiting to see if the light comes back on.

 

[Cheryl Lyne]

Here's a pic of my car's engine.

 

[Handy Andy]

You have one like others that like us, drive a Fiesta...


Here...


Just look down thru that gap, you'll find that harness and the IMAPT sensor.

There is a rubber hose snaking thru from the intake by that IMAPT - that is the PCV hose. It routes back towards the engines cylinder head - to the valve and the cover.

A word of advice - the PCV valve in the USA cannot be exchanged or swapped out for another one, it is integrated into it's holder. The Whole unit, it has to be replaced, the whole assembly - holder and all - and it's bolted to the cylinder head so you'll need tools and lots of time to take this thing apart to replace it.

If your still have ambitions and your family has tools and help to lend a hand - you can do this - it just takes time.

Research SIGMA motor from FORD or FORD Sigma Motor in a search engine to find out more about this engine.

 

[Cheryl Lyne]

Thank you so much! So far the check engine light is staying off so maybe replacing the pressure sensor did the trick. If the problem persists I'll take it to a local mechanic. He does good work and doesn't overcharge. Again, thanks so much for your help!

 

[Michael_Mikey_Mike]

Hey everyone. I'm trouble shooting a P291A code on my daughter's 2015 FIesta SE 1.6L. MAP sensor covered oil replaced that today in case it was damaged. Pulled the plugs which are all a bit oil fouled. My best guess is that the PCV valve is bad but man finding info that lines up with what I'm seeing on this motor is hard to tell what's what. I attached the best pic I could get of the PCV hose based on the comments above and then found the video below that makes it seem fairly easy to replace (I know it's not in the US). The problem is when I search for a part for this it only come up as a hose that looks nothing like this or even a bolt in version. Any advice or insights?

Video Link:

***EDIT: I rewatched video and heard that he said this is a 1.2L motor, but it does look very similar to the one I'm working on.

 

[Handy Andy]

The PCV valve was replaceable on earlier UK models of the Fiesta - until about 2009 - then they changed the motor from a Ztec to a Sigma - and made a plastic seated PCV housing designed to help keep oil from getting sucked back into the motor and only allow the vapors from the engine combustion to keep oil from fouling the plugs.

Nowadays, this only happens when you overfill the oil past 4 quarts - it raises the oil level and the splashing and engine movement as you drive and make turns - the sloshing of too much oil in the crankcase will foul out the plugs because the PCV valve still will suck in oil - it can't prevent direct exposure from oil getting into the baffle that is only designed for intake of vapors and lets oil drops the vacuum the valve makes - to precipitate out back into the crankcase.

The steps to remove/install the PCV valve is more extensive - you have to remove the intake manifold to obtain access to all the bolts and the seal it uses to keep oil in - and replace the entire baffle for the PCV valve is integrated into the baffle and is not swap-able - I learned this the hard way.

 

[Michael_Mikey_Mike]

The PCV valve was replaceable on earlier UK models of the Fiesta - until about 2009 - then they changed the motor from a Ztec to a Sigma - and made a plastic seated PCV housing designed to help keep oil from getting sucked back into the motor and only allow the vapors from the engine combustion to keep oil from fouling the plugs.

Nowadays, this only happens when you overfill the oil past 4 quarts - it raises the oil level and the splashing and engine movement as you drive and make turns - the sloshing of too much oil in the crankcase will foul out the plugs because the PCV valve still will suck in oil - it can't prevent direct exposure from oil getting into the baffle that is only designed for intake of vapors and lets oil drops the vacuum the valve makes - to precipitate out back into the crankcase.

The steps to remove/install the PCV valve is more extensive - you have to remove the intake manifold to obtain access to all the bolts and the seal it uses to keep oil in - and replace the entire baffle for the PCV valve is integrated into the baffle and is not swap-able - I learned this the hard way.

Thanks for the explanation on why I've seen some differing info on this motor. In the past couple of days, I've realized some of this and found a video of how to replace the head which show many of the steps needed to replace the oil separator/pcv. On m daughters though, it's actually a little low on oil likely do to burn off and becasue of too much crank case pressure it pushing oil past the cram position sensor as well. I bought a cheap but decent smoke machine to check for any other vacuum leaks once the intake gaskets and new separator come in.

Video Links in case it can help someone else in the future:

https://youtu.be/3qeKcoDHi2s?si=P7IaRBksdYl6s17C&t=411