[Coyote Chaser]

You have probably already done this, but check both hose connections, (at the block and at the throttle body). The OEM hose is almost an exact fit and you not have a perfect fit if had to stretch the hose to fit after adding the spacer.
*Why did you add the spacer? Is there a performance advantage, etc??

 

[gatornek]

I am having this same code issue. 2019 eco stang. I recently added a SR Performance throttle body spacer. Could that have something to do with code P04db????

Did you disconnect the driverside pcv hose in order to get more space to add the throttle body spacer? If so, doublecheck that you properly connected it back 'all the way'. Sometimes, it doesn't seat well. Make sure you get an audible 'click' when plugging it in.

 

[PAINTMOON]

You have probably already done this, but check both hose connections, (at the block and at the throttle body). The OEM hose is almost an exact fit and you not have a perfect fit if had to stretch the hose to fit after adding the spacer.
*Why did you add the spacer? Is there a performance advantage, etc??

 

[PAINTMOON]

I added the spacer because I am a nerd and cannot stop messing with car. So yes I think I need to recheck ever connection and sensor I undid when I put the spacer in. The weekend before spacer I put in new intercooler pipes. So checking all those connections too. I was pretty meticulous about everything but maybe something came lose. Thanks for getting back on this.

 

[dgc333]

I added the spacer because I am a nerd and cannot stop messing with car. So yes I think I need to recheck ever connection and sensor I undid when I put the spacer in. The weekend before spacer I put in new intercooler pipes. So checking all those connections too. I was pretty meticulous about everything but maybe something came lose. Thanks for getting back on this.

The code is generally associated with the clean side hose. Since you were replacing charge pipes I would pay particular attention to where the clean side hose connects to the intake tube right before the turbo.

Sent from my motorola one 5G using Tapatalk

 

[PAINTMOON]

Did you disconnect the driverside pcv hose in order to get more space to add the throttle body spacer? If so, doublecheck that you properly connected it back 'all the way'. Sometimes, it doesn't seat well. Make sure you get an audible 'click' when plugging it in.

 

[PAINTMOON]

I checked everything again and I must admit I had suspect connection before turbo. The hose clamp was slipping from rubber to metal. Maybe not enough muscle when putting that on. So codes cleared let’s see what happens. Thanks all.

 

[Coyote Chaser]

I added the spacer because I am a nerd and cannot stop messing with car. So yes I think I need to recheck ever connection and sensor I undid when I put the spacer in. The weekend before spacer I put in new intercooler pipes. So checking all those connections too. I was pretty meticulous about everything but maybe something came lose. Thanks for getting back on this.

LOL...I'm right there with you! I'm always doing/adding something.
I've heard about adding a spacer to the throttle body, but don't understand what they are for. Thought you might be adding meth or NOS...?

 

[gatornek]

LOL...I'm right there with you! I'm always doing/adding something.
I've heard about adding a spacer to the throttle body, but don't understand what they are for. Thought you might be adding meth or NOS...?

Not to poopoo what the OP was doing, but in all honesty, a spacer serves no purpose in this MAP tuned vehicle other than aesthetics. That is, unless, like you state...you want to add a separate bung for meth injection. But in all fairness, I too have a throttle body spacer. However, my reason adding it was because when I swapped out my stock charge pipes for the injen charge pipe kit, I found the cold side pipe just slightly short of where it should be and on the bleeding edge of the throttle body. So adding the spacer basically brought out the throttle body more and now the cold pipe sits much more flush.

 

[gatornek]

I checked everything again and I must admit I had suspect connection before turbo. The hose clamp was slipping from rubber to metal. Maybe not enough muscle when putting that on. So codes cleared let’s see what happens. Thanks all.

No worries. This is a great website to "nerd out" like you say. We've seen just about every possible issue arise with the Ecoboost Mustang. A lot of knowledgeable folk here. Feel free to shoot your questions.

 

[hightide18u]

So about maybe 3-4 weeks ago, I pull out of a gas station, get a little froggy with a full tank of gas, rev out some and listen to my exhaust, and CEL pops up. Sh!t. Ok, no problem. Pull back in home, hook up my OBD2 and read that crankcase ventilation Pressure P04DB is tripped. I'm like "Hmmmm....I guess maybe some PCV hose came loose or something". I am running the Ford Perf catchans on each PCV outlet. But to my chagrin, everything is snapped up from valve to can to recirculation point on each. Electrical connector is seated for the cleanside FP solution.

I clear the code. All is good.

Now, this is what I'll say about my engine. As of late.....I have been noticing that at cold idles, the tach rpm may dip down to like 500K for a brief second. Ive also been noticing 'misfire' count increments. It's like almost a given that my 'misfire' count will be ONE, by the time I connect to it via OBDFusion. I have not been able to correlate if those 'dip' in RPMs (which I have felt exactly 3 times in the past few months) are related to the 'misfiires'. The 'dips' aren't anything that chokes the car up. It's bat of an eye quick. Before I really have a chance to notice anything, its back at 700-800K. I definitely have not felt the dips anywhere near as often as I see the 'misfire' counts.

So, just pulled out right now after doing the coolant reservoir makeover, and CEL pops back up. Doh!

Pull back in, hook back up, and lo and behold....P04DB. "Permament"....OBDFusion says. It can't clear it out. I have to hookup Forscan to get it to clear out. Again, all catchcans are hooked up, AS FAR AS I CAN TELL.

I guess the easy solution is to put my OEM cleanside PCV hose back in, and see if the problem goes away. That's what I might do. I'm going to leave it there for one more round and see if it rears its head again. Im kind positive it will, but I'm going to adjust my datalogging to see if I can catch it.

I might take a look at my plugs in the meantime, but I don't think these have more than 10K or so on them. That's not bad, is it? You think a plug change might be in order?

Any thought or ideas are welcome.

After 6 months of crankcase vent CELs on my Ford Performance Oil Sep, I think I finally fixed it. Let everyone know. There is two small rubber Orings in the connector to the Oil Catch Can. The Oring gets off track in the hose. It's a defect in workmanship or design. I fished the loose O Ring out and put it over the male part of the Seperator and then installed the hose. That made a bond that would not let air leak in when clicked. Reaching out to Ford Performance today. Maybe they can fix or everyone who cleans their can will have to deal with this each time.

 

[gatornek]

After 6 months of crankcase vent CELs on my Ford Performance Oil Sep, I think I finally fixed it. Let everyone know. There is two small rubber Orings in the connector to the Oil Catch Can. The Oring gets off track in the hose. It's a defect in workmanship or design. I fished the loose O Ring out and put it over the male part of the Seperator and then installed the hose. That made a bond that would not let air leak in when clicked. Reaching out to Ford Performance today. Maybe they can fix or everyone who cleans their can will have to deal with this each time.

Are you talking specifically about the "cleanside" catchan that routes on the passenger-side of the car?

 

[PCG 805 Racing]

So about maybe 3-4 weeks ago, I pull out of a gas station, get a little froggy with a full tank of gas, rev out some and listen to my exhaust, and CEL pops up. Sh!t. Ok, no problem. Pull back in home, hook up my OBD2 and read that crankcase ventilation Pressure P04DB is tripped. I'm like "Hmmmm....I guess maybe some PCV hose came loose or something". I am running the Ford Perf catchans on each PCV outlet. But to my chagrin, everything is snapped up from valve to can to recirculation point on each. Electrical connector is seated for the cleanside FP solution.

I clear the code. All is good.

Now, this is what I'll say about my engine. As of late.....I have been noticing that at cold idles, the tach rpm may dip down to like 500K for a brief second. Ive also been noticing 'misfire' count increments. It's like almost a given that my 'misfire' count will be ONE, by the time I connect to it via OBDFusion. I have not been able to correlate if those 'dip' in RPMs (which I have felt exactly 3 times in the past few months) are related to the 'misfiires'. The 'dips' aren't anything that chokes the car up. It's bat of an eye quick. Before I really have a chance to notice anything, its back at 700-800K. I definitely have not felt the dips anywhere near as often as I see the 'misfire' counts.

So, just pulled out right now after doing the coolant reservoir makeover, and CEL pops back up. Doh!

Pull back in, hook back up, and lo and behold....P04DB. "Permament"....OBDFusion says. It can't clear it out. I have to hookup Forscan to get it to clear out. Again, all catchcans are hooked up, AS FAR AS I CAN TELL.

I guess the easy solution is to put my OEM cleanside PCV hose back in, and see if the problem goes away. That's what I might do. I'm going to leave it there for one more round and see if it rears its head again. Im kind positive it will, but I'm going to adjust my datalogging to see if I can catch it.

I might take a look at my plugs in the meantime, but I don't think these have more than 10K or so on them. That's not bad, is it? You think a plug change might be in order?

Any thought or ideas are welcome.

99% chance the o ring in the connecter s dislodged and you need to deal with that. Just lose enough to leak. I fished out my o ring and put it over the male part on the can and snapped back together. No codes. Silly FP didn’t make the o ring stable enough to stay in place.