My brother recently had his rear driver side caliper replaced. Afterwards, the CEL came on and a bunch of codes came up.

#1: 44-1 ABS left rear wheel lock
#2: 61-1 ABS battery voltage malfunction

I'm assuming these are the result from messing with the caliper. I don't know a single thing about ABS and it's not helping my Google searching much... Can anyone shed some light on this?

 

The DTCs may be indicated under these conditions:

The vehicle goes into a spin.

The ABS continues to operate for a long time.

Snow, dirt, or debris build-up on the wheel speed sensor or magnetic encoder.

Misadjusted brake pedal position switch

Contaminated brake fluid