I had no codes or issues prior to swapping out my radiator. A pully did cut a wire on my abs harness which since has been fixed.
My new negative cable was an ac delco cable and the sensor is put on the right way(tab is facing away from the terminal) but I did notice the sensor part numbers were different. I was thinking of putting the old one back on to test but I will test the connector to make sure.
Did you have the b1516 code before working on the car? If not, you've more than likely turned the battery current sensor around the opposite way when installing it.
See the following for troubleshooting information: https://www.brakepartsinc.com/dam/jcr:dd879eb0-b5a0-4eb3-862b-2cb49f40e18d/13) Technical Service Bulletin - November 2017.pdf