So about 10 min into my drive today I noticed my CEL came on when it came on i dont know that's when I noticed it, but no messages no beeping, just boop a light is on. Checked the code at oreilly's and it came up P051B crankcase pressure sensor. All my looking around online just said the same so does anyone know wth it means nd should I be worried about getting stranded with this massive ice storm coming in? Truck runs 100% like normal save for the light. And of course local ford dealership closed 10 min before the light came on

 

Are you running any type of aftermarket catch can?

 

Nope, only mod under the hood is my K&N intake and that's been on for nearly 30,000

 

What engine? What year?

Description

This DTC sets when the crankcase pressure sensor is greater than or less than an expected value for the current operating conditions.

Possible Causes:
Crankcase pressure sensor is not within a calibrated range during key ON, engine OFF
Crankcase pressure sensor voltage indicates high pressure
Crankcase pressure sensor voltage indicates high vacuum at low airflow
Leak in the positive crankcase ventilation (PCV) system
Damaged crankcase pressure sensor

 

https://www.f150forum.com/f118/p051b...rmance-367240/