ISX15 CM2250 IMAP sensor erratic, intermittent or incorrect

[zyNoT]

Hello,

I'm having this code come up, the manifold gauge shows under 0.

Here's some background:

1.) this sensor was replaced 5 months ago, has worked fine until now.
2.) went out, wiggled some wires, started up truck, manifold gauge works.
* still not sure if wiring is the issue.
3.) cleared codes, drove down the road for about 17 miles, code comes back, manifold guage goes to 0.

Should I be looking to just replace the sensor AGAIN, or should I be looking at wiring?

Also, would putting holes in the crankcase filter cause this without a custom tune? This was done recently after replacing the filter recently, but ran fine for awhile after.

Any help is appreciated. Thanks!