P04DB

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Tremper126

Active Member
Feb 15, 2019
130
53
28
Partlow, Virginia
Truck Year
2014
Anyone had this code before? Got it once a few weeks ago hauling a load of wood on the trailer down the road got it as soon as I was pulling out of the driveway. I got it again today empty heading home. I noticed this morning on the way to work my throttle seemed a little more lag than normal but just figured it was the cold fooling with it. I checked the crank case hose as suggested by another post on here and checked all my vacuum lines. I noticed at an idle if I take my oil cap off it seems to be a little bit of a positive pressure coming from it. Oil looked fine, 3k on it and looked fairly clean for what it is.
 

carlhenry

Well-Known Member
Nov 21, 2018
1,199
211
63
Truck Year
Not Listed
I thinh it is crankcase breather sensor but it was on early ecos and is no longer serviced
 

Tremper126

Active Member
Feb 15, 2019
130
53
28
Partlow, Virginia
Truck Year
2014
Yeah I read in another thread it’s discontinued. I checked the hose connections and it seems okay. Idk what the hell its doing. Might just do aem flash earlier than anticipated and tune and delete egr and change oil cooler for good luck. I’m wondering if my egr shit the bed again. It’s been 23k since previous owner did it at dealer.
 

Tremper126

Active Member
Feb 15, 2019
130
53
28
Partlow, Virginia
Truck Year
2014
I got to thinking about it... my last oil chance was 2-3k ago and I think I ended up with almost 12 quarts added. Wonder if I overfilled it or didn’t give it enough time to settle
 

Tremper126

Active Member
Feb 15, 2019
130
53
28
Partlow, Virginia
Truck Year
2014
Wanted to provide some update into my code. Since it’s saying it’s intermittent not immediate like others situations, I started retracing my steps. I found a setting in alfaobd that was something along the lines of performance shift enabled. I turned it on a few months ago and since then the code has come up twice. I noticed when driving my truck wouldn’t shift, instead it wanted to build more boost. I’m wondering if for some reason the sensors were thrown off from the ecm seeing as how the truck wasn’t coded from the factory that way. Drove it yesterday and seems to be shifting correctly now where as before around 40-50 mph I could hit the gas and it would almost slug until I hit the pedal more then it would shift. I’ll keep you updated!