Rep Power: 0

I’m getting a U0155 and I can’t figure it out. I ordered an alternator hoping it’ll fix it but my battery light is on as well as engine light.

I tried a new battery, same issue. The alternator is not killing the battery, however, recently I started to have to hold the push button for 4-5 seconds to get it to start as it won’t start instantly anymore when I push the button.

any tips?

 
Rep Power: 126

Have you read the codes yet?

 
Rep Power: 0

U0155. It’s saying it lost communication to the cluster or something. Just not sure where to start.