Qashqai Auxiliary Battery Alarm Issue

I had a similar issue with my Qashqai, though it's not a hybrid. Same symptoms – alarm system completely dead and an error code. Did you do a battery check? A weak auxiliary battery can throw everything off. I'd start there.

Did the system diagnosis specifically identify the auxiliary battery, or did it require further investigation? I am trying to avoid replacing parts unnecessarily.

The system diagnosis wasn't clear at first. It pointed to a general alarm system malfunction. The workshop checked the auxiliary battery and found it was completely drained. These batteries can fail without warning. It sounds like a battery problem. A proper battery check at a workshop will confirm.

Based on your experience, I will get a battery check at a trusted workshop. It looks like a replacement is coming. The estimated repair cost is about 330€. Thanks for sharing your knowledge!