Trouble code PO 04DB Crankcase Ventilation issue?

[RDuncan]

I had posted a question a few months back about code po 2260 check engine light on. I was using an old scanner. I upgraded to the Aplha obdII after my check engine light came on again and it is showing po04DB. I had taken the truck to the dealer for this recently but the check engine light went off and it did not retain the code so dealer was not able to diagnose it. I can show him the code now. I have read it has something to do with crankcase ventilation system. I checked hoses and seem ok. Truck only has 20k? Anyone else have this issue? thanks!!

 

[Timd32]

I think folks figured your last code was a P2280, not 2260, at the end of that thread JimW said to check the air damper set up that might be an issue.

My guess is you changed the Autozone filter with a new Mopar or Fleetguard did that fix your other issue.

I guess if this new code is a historical comparison of stored data, it could still be somewhat related if the crankcase pressure is off a bit, but here is what I see on this latest one.


P04BD
CRANKCASE VENTILATION SYSTEM DISCONNECTED

• When Monitored:
  Engine at operating temperature, driving at a steady speed. This monitor takes 10 minutes to completely run.
  
  
• Set Condition:
  Crankcase Pressure readings have been significantly elevated, as compared to historic trends saved in the Powertrain Control Module

---DISCONNECTED CRANKCASE VENTILATION HOSE
Visually inspect the Crankcase Ventilation Hose.

• Is the hose disconnected, cracked, pinched or damaged?

---INTAKE SYSTEM LEAK

Perform the INTAKE AIR SYSTEM PRESSURE TEST diagnostic procedure.

Were any Intake System leaks found?
Yes
Make repairs as needed.

No

• Replace the Crankcase Breather Filter in accordance with the service information.

---CRANKCASE BREATHER FILTER CLOGGED

There is also a standard procedure to verify the PCM stuff after the repairs.

Good luck with your repair.