P04DB Code (Crank Case Vent)
Thread Starter
|
Laughing Gas
Joined: Jul 2008
Posts: 772
Likes: 27
From: Brighton CO.
P04DB Code (Crank Case Vent)
Hello,
2015 with 35,200K on the OD. All stock! Hasn't been modded in any way.
I've been throwing a P04DB ,only, code off and on for awhile now. And now, it's constant. I know there is a couple of other codes that can go along with this but I'm not getting them.
I've somewhat started tracking when the code would return after clearing it. In the last 2 days, I've cycled the engine on and off with the key only and no code.
It appears, that the only time the P04DB code sets is when I use the remote start.
I'm still testing this theory but so far that's what seems to be happening.
I'm wondering if there is a slight voltage change when using the remote start that is causing this issue?
I've read where this issue is not only a 6.7 issue or even just limited to Ford.
The other thing that really sucks about this issue is if the sensor is bad you just can't get a new sensor, you have to buy the whole crank case vent filter housing too. Brilliant I say, just brilliant.
Does anyone else have any more information on this issue?
Thanks
2015 with 35,200K on the OD. All stock! Hasn't been modded in any way.
I've been throwing a P04DB ,only, code off and on for awhile now. And now, it's constant. I know there is a couple of other codes that can go along with this but I'm not getting them.
I've somewhat started tracking when the code would return after clearing it. In the last 2 days, I've cycled the engine on and off with the key only and no code.
It appears, that the only time the P04DB code sets is when I use the remote start.
I'm still testing this theory but so far that's what seems to be happening.
I'm wondering if there is a slight voltage change when using the remote start that is causing this issue?
I've read where this issue is not only a 6.7 issue or even just limited to Ford.
The other thing that really sucks about this issue is if the sensor is bad you just can't get a new sensor, you have to buy the whole crank case vent filter housing too. Brilliant I say, just brilliant.
Does anyone else have any more information on this issue?
Thanks
Post Fiend
Joined: Nov 2001
Posts: 6,748
Likes: 118
From: Tallassee, ALabama
You should be under warranty, bumper to bumper 3/36K or the engine 5/100K. I would schedule a visit to the dealer and have them determine the problem.
but, if you want to chase it...
The 6.7L diesel engine has a crankcase ventilation separator mounted on the driver side rocker cover, with a tube connecting the separator to the fresh air inlet of the turbocharger. The tube on the separator side has a tamper proof collar installed and is plastic welded to the separator. On the fresh air inlet side, a hall effect sensor is present, to detect connection to the inlet casting assembly. The tube cannot be disconnected on the separator side, and if it is disconnected from the inlet casting, a P04DB code is set, as sensor output drops below a calibrated threshold. There are also circuit range checks, P04E2 and P04E3 to detect shorts to ground, or short to battery/disconnected sensor, respectively.
From the MY15 OBDII
http://www.fordservicecontent.com/fo...DOBDSM1501.pdf
but, if you want to chase it...
The 6.7L diesel engine has a crankcase ventilation separator mounted on the driver side rocker cover, with a tube connecting the separator to the fresh air inlet of the turbocharger. The tube on the separator side has a tamper proof collar installed and is plastic welded to the separator. On the fresh air inlet side, a hall effect sensor is present, to detect connection to the inlet casting assembly. The tube cannot be disconnected on the separator side, and if it is disconnected from the inlet casting, a P04DB code is set, as sensor output drops below a calibrated threshold. There are also circuit range checks, P04E2 and P04E3 to detect shorts to ground, or short to battery/disconnected sensor, respectively.
From the MY15 OBDII
http://www.fordservicecontent.com/fo...DOBDSM1501.pdf
Thread Starter
|
Laughing Gas
Joined: Jul 2008
Posts: 772
Likes: 27
From: Brighton CO.
Hey, Thanks Larry.
True, I'm still under warranty.
I have an appointment for Wednesday to at least get it scanned and documented. I like be as informed as I can be before I take my vehicles in for repair. The only reason I'm taking it in now is because it's under warranty.
At this point, I'm trying to figure out why the code only pops when I use the remote start. So far today, I've only key started it and no code.
I watched a Youtube video on this issue that was pretty informative. The guy who made it did a pretty good job explaining how trouble shooting this particular issue. I'm just thinking my issue mis different because it seems to only pop when I use the remote start.
As always, Thanks for any response.
True, I'm still under warranty.
I have an appointment for Wednesday to at least get it scanned and documented. I like be as informed as I can be before I take my vehicles in for repair. The only reason I'm taking it in now is because it's under warranty.
At this point, I'm trying to figure out why the code only pops when I use the remote start. So far today, I've only key started it and no code.
I watched a Youtube video on this issue that was pretty informative. The guy who made it did a pretty good job explaining how trouble shooting this particular issue. I'm just thinking my issue mis different because it seems to only pop when I use the remote start.
As always, Thanks for any response.
Lead Driver
Joined: Dec 2013
Posts: 9,762
Likes: 115
I'd want to get it documented and before my 3/36 is up, that way if you need a large expensive piece it would be covered... I also understand wanting to know as much about it as possible before you bring it in. (I do the same thing).
Lead Driver
Joined: Nov 2005
Posts: 5,212
Likes: 4,215
From: Kaysville Utah
This pop'd up on my truck today.
P04DB
P0000
P0000
Are the codes I retrieve. I cleared them and as soon as I start the truck they pop back up.
I called the dealer and they are booking a week out. Wow. Usually I call and they get me in the next day. They must have down sized the Diesel Mechanic staff. Too many 6.7L engines with no warranty work vs the old days of 6.0L and 6.4L engines that kept a full team of mechanics busy.
I may try and go find that YouTube video and see if I can track this down
P04DB
P0000
P0000
Are the codes I retrieve. I cleared them and as soon as I start the truck they pop back up.
I called the dealer and they are booking a week out. Wow. Usually I call and they get me in the next day. They must have down sized the Diesel Mechanic staff. Too many 6.7L engines with no warranty work vs the old days of 6.0L and 6.4L engines that kept a full team of mechanics busy.
I may try and go find that YouTube video and see if I can track this down
Thread Starter
|
Laughing Gas
Joined: Jul 2008
Posts: 772
Likes: 27
From: Brighton CO.
Painted Horse,
I was finally able to get mine fixed under warranty. It only took two trips and two weeks to get it fixed. Apparently, the crank case vent filter was hard to get? The issue is the sensor is a pickup sensor that registers that it's connected. If the sensor fails the whole crank case vent filter has to be replaced. I have to wonder is a build up of oil in the connection will cause it not to pickup the connection.
The only issue I had when the code was active is I couldn't remote start my truck which at the time we were getting super low temps over night and it made for a pain to warm up the truck.
I was finally able to get mine fixed under warranty. It only took two trips and two weeks to get it fixed. Apparently, the crank case vent filter was hard to get? The issue is the sensor is a pickup sensor that registers that it's connected. If the sensor fails the whole crank case vent filter has to be replaced. I have to wonder is a build up of oil in the connection will cause it not to pickup the connection.
The only issue I had when the code was active is I couldn't remote start my truck which at the time we were getting super low temps over night and it made for a pain to warm up the truck.
New User
Joined: Feb 2006
Posts: 24
Likes: 0
I would think that it was only a coincidence that the remote start problem happened at the same as the P04DB problem.
I've been getting that same code off and on for a while now. I wondered about an oil coating on the inlet to the lower intake too. So, I wiped it clean. Doesn't appear to have anything to do with the code. Apparently, the hall affect sensor that they use to prove that the hose is attached to the lower intake is subject to failure. Mine is a 2014 and only about 11,500 miles.
A major PITA to have to change the whole crankcase vent oil separator just to replace a little sensor on the end of the hose. Nannies running amuk -------------
I've been getting that same code off and on for a while now. I wondered about an oil coating on the inlet to the lower intake too. So, I wiped it clean. Doesn't appear to have anything to do with the code. Apparently, the hall affect sensor that they use to prove that the hose is attached to the lower intake is subject to failure. Mine is a 2014 and only about 11,500 miles.
A major PITA to have to change the whole crankcase vent oil separator just to replace a little sensor on the end of the hose. Nannies running amuk -------------
Trending Topics
Thread Starter
|
Laughing Gas
Joined: Jul 2008
Posts: 772
Likes: 27
From: Brighton CO.
I only had the PO4DB code active (CEL). No remote start.
If I cleared the code, My remote start would work.
If I cleared the code, My remote start would work.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Ford Super Duty: 5 Things Owners LOVE, 5 Things They LOATHE!
Joe Kucinski
Every 2026 Ford Truck Engine RANKED from WORST to FIRST!
Michael S. Palmer
The Best F-150 Deal of Every Trim Level (XL through Raptor)
Joe Kucinski
New User
Joined: Feb 2006
Posts: 24
Likes: 0
I have come to understand that there is now a reflash available that programs this sensor out of the software and eliminates this P04DB code for at least the 2011 thru 2014 engines with the hose that is removable from the oil separator. The new hoses no longer even have the pins in the connector that plugs in to the wiring harness.
Anyone else heard this??? Or is this story just more B.S.???
Anyone else heard this??? Or is this story just more B.S.???
Thread Starter
|
Laughing Gas
Joined: Jul 2008
Posts: 772
Likes: 27
From: Brighton CO.
Same for me a couple of weeks ago. Dealer replaced and no mention of of a new flash to eliminate the issue. Wonder if Ford started doing this to save themselves $ under warranty.
New User
Joined: Feb 2006
Posts: 24
Likes: 0
Well, there really isn't anything else for you to do other than waiting it out to see if it goes away. The code means that your truck thinks that you have disconnected the oil separator hose from the lower intake manifold. Most likely, you have not done that. So, it means that the hall effect sensor on the end of the hose is failing --- maybe. My CEL light went away after a few ignition cycles and has not returned yet. So, I'm just going to wait it out and see what happens.
