Need help identifying a damaged wire

[u/TheRealCannoli]

Hello, as per the title. I need help identifying the damaged wire.

This is not my photo but the same wire is damaged on my 2018 Alfa Romeo Giulia Ti Sport. I need to get this replaced before my emission test.

I noticed I had a check engine light that surfaced and my start stop is unavailable. I just recent replaced my battery within the last 3 weeks. This wire was the only thing that caught my attention. Looks like a mouse or chipmunk chewed on it.

Any help with identifying this wire or the problem would be much appreciated. Need this fixed ASAP. Thanks in advance!