I have a Ram 2500 5.7l hemi with 220,000 miles on it. Yesterday I got in my truck after work and started it and it started but it was shaking horribly and I risked it and drove home (its not that far). I plugged in my obd2 sensor and got the following codes. "P0522 engine oil pressure sensor/switch circuit low input" and i also got "P0300 Random misfire detected"
Im pretty stumped i guess maybe my oil pump but that doesn't explain my misfire. I really dont want to say this but is it possible my cylinder head cracked and let oil into a cylinder or two and oil drained into the cylinders so im low on oil and thats why i got the low oil code and because of the oil its not firing so im getting the misfiring code.

after i submit this im going to go check the oil level and report back...

 

high miles & excess oil burned resulting from= worn rings and/or valve seals--->do a dry/wet compression test to obtain answer...yes 220k could = cracked head and oil loss causing misfires. And misfires will cause it to run rough
What is your oil gauge doing? @ idle and driving speeds? #'s?