Could the P1668 and P560 be related? 1668 is the anti-theft open circuit and 560 is battery low. If so, who has an inkling of where I should begin checking?

Also throwing a P304 code (misfire cylinder 4)

All of these started after I removed and replaced my power steering pump. Surely they're not related.....

Thanks,

 

So, start with the simple stuff, go have your charging system tested, voltage should be between 13.6 and 14.4 volts.