ABS problems

[simpreza2]

I pulled the codes from my abs computer and I got...

 

34- I counted it 2 times and got 34 but there is no 34 so Im guessing its a 33 which is a solenoid valve left front

 

42- low supply voltage

 

51- valve relay problem

 

Could any of these like the 42 cause the system to trip the 33 and 51? I dont understand how all 3 things went at the same time. The abs was fine when I bought it abour 6-8 months ago. I did swap the brakes to wrx calipers and wheels but it shouldnt of messed all this up. If anbything I might of hit a wheel sensor but it doesnt say anthing about a wheel sensor.

 

And for now while the abs isnt working correctly. Should I leave it "broken", where it comes on sometime on dry smooth roads or should I just take the fuse out and just be super careful?

 

Thanks,

Jon