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Discussion Starter · #1 ·
Don't laught too much.
I tried to make the hoses as short as possible. The inlet and outlet are on the wrong side so I improvised.
I added a charboy in thr can and outlet to catch more gunk. Maybe that was too restrictive?
Code popped up right away.
Thoughts?
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Discussion Starter · #6 ·
Is this a Jeep (the pressure differential sensor looks a little different)?

Regardless, I've found that this sensor can be very fussy about any changes. I fixed a truck that had an engine fire, and replaced the makeup air hose section from the heater to the oil separator with a straight hose connected to the fitting with a hose clamp.

Within 20 miles of driving, I had a P04DB. No matter what I tried, I could not get it to go away. Finally, I replaced the whole makeup air hose assembly from the turbo inlet to the oil separator, cleared the code, and it never came back. I can only surmise that this acceptable range for this sensor is a very narrow bandwidth

I realize this doesn't help you solve your problem, but thought I would share my experience. I also note that when I had the GDE tune installed, I never got any codes, so I suspect that GDE may have adjusted the range for the sensor, or otherwise resolved the sensitivity.
That is GREAT info as I am about to pull the trigger on GDE.

Thank you!
 

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Discussion Starter · #7 · (Edited)
That is GREAT info as I am about to pull the trigger on GDE.

Thank you!
You added too much restriction, the sensor is looking for a small range in pressure and it is outside the window. Check the coolant radiator hose where it attaches to the engine. Looks like the factory did not push hose on fully and constant tension clamp is near the edge.
Whoa!
Thank you! I will correct that next time I’m under the hood.

My GDE tune order was placed this evening.
 

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Discussion Starter · #8 · (Edited)
Don't laught too much.
I tried to make the hoses as short as possible. The inlet and outlet are on the wrong side so I improvised.
I added a charboy in thr can and outlet to catch more gunk. Maybe that was too restrictive?
Code popped up right away.
Thoughts? View attachment 93285
View attachment 93286
Don't laught too much.
I tried to make the hoses as short as possible. The inlet and outlet are on the wrong side so I improvised.
I added a charboy in thr can and outlet to catch more gunk. Maybe that was too restrictive?
Code popped up right away.
Thoughts? View attachment 93285
View attachment 93286
I think a cure for "catch can codes" (thank you GDE)
If you pick up a code when you install an oil catch can move the sensor down stream of the can and block off the open port. I want to remove all the oil & water I can so i loaded up my can with stainless steel choreboys.
BTW, The devise closest to the intake is a heater, not a sensor.
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Discussion Starter · #9 ·
You added too much restriction, the sensor is looking for a small range in pressure and it is outside the window. Check the coolant radiator hose where it attaches to the engine. Looks like the factory did not push hose on fully and constant tension clamp is near the edge.
Thanks! I fixed that today. Didn’t lose much antifreeze either!
 
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