Location of Crankcase Pressure Sensor?

[zombiedude]

duplicated comment, either you can’t delete messages or I’m dumb can’t figure it out.. anyways, disregard.

 

[zombiedude]

Update:

Mar. 8th - Drove 70 miles through 3 separate trips (car was off for more than 3 hours between trips), hard driving multiple pulls from stop lights and from a roll. No hit for the code.

Mar. 9th - kinda expected to get the code based on the every other day basis, but to my delight, so far nothing. Cold started, idled for a few minutes. Medium acceleration out of the neighborhood which had tripped the code twice prior under the same conditions. Once it was warmed up, did a hard pull from a stop light and a few small pulls around town for another 10 miles. No codes, no issues. At about 3,165 miles.

Last hit was on the 6th @ 3,060 miles. Been 3 days and 100 miles which is beyond the typical threshold. If I continue to not get the code, 5 more days or 140 miles and I’ll swap back to the silicone tube to see if it replicates the issue.

Afternoon of Mar. 10th. Still nothing. 5 miles driven in 2 trips. Didn’t alter my morning routine, idled for 5 mins before leaving, medium accel out of the neighborhood, hard accel a bit closer to work once the car was warm. Same thing on my way home for lunch. Checked my code reader and the P04DB code removed itself from the “permanent codes” section on its own, which I was only able to clear by disconnecting the battery previously. 90% certain the problem is fixed, but I’ll go a couple more days to be sure.

No idea why a silicone tube would cause a vacuum line disconnected code yet here we are..

 

[oddball]

The airflow through the tube changes, and maybe just enough to upset a sensor or two. This is somewhat common with evap and EGR systems when modifying exhaust or intake. The JB4 folks might be able to tell you if they've heard this very much.
The silicone elbows are cool, but won't have a very significant impact.

 

[Thomby]

For what it's worth, I asked ChatGPT and Claude.ai after not being able to find a dedicated crankcase sensor part, and both stated the Stinger does not have a separate crankcase pressure sensor, but instead estimate PCV function/flow via the TMAP (ie manifold vacuum dropping slightly when PCV is open).

So that's another point in the "transitory error due to change in flow" column.