Does my battery need to be replaced?

I received the P0A80 error message for the first time a couple of weeks ago. Reset with the temporary fuse fix before taking it to the dealership when it reappeared. They ran codes and told me it was "more than likely" just a battery fan issue. Reset the code again through some app but said it was a temporary fix. They needed to reschedule me for a fan cleaning, so I went home and attempted to clean it myself. Removed a TON of dust built up from the fan blades and a layer from the mesh filter.

Put everything back in place and it's been driving normally for over a thousand miles. Gas mileage has been great, no weird noises, even driving in colder than usual weather. Then, when I started it up this morning, it was noticeably rumbly, and within a few minutes the CHECK HYBRID SYSTEM message reappeared

I did the fuse reset again as I was on my way to work. Planning on taking it in to get maintenance as it needs an oil change anyway. Is this indicative of a real issue with the battery or is it possible that the fan is at fault? The extended normal period after cleaning it makes me think it had something to do with it. There was a jacket blocking the fan vent when the message reappeared, so wondering if that may have caused it. Any advice or experience appreciated!

 

As mentioned i had them read and it was P0a80. that was before I cleaned the fan and received the message again about a thousand miles later. Would it show up any differently after the cleaning, or if that’s the issue rather than a full battery failure?

 

thank you for the helpful feedback! I was surprised as well, I’ve had no other issues leading up to this. Is there a way to get trhe battery itself checked out/cleaned? Or is replacement the only option?

 

I did a reset with the fuse because it freaked me out. Ive had a COOLING PERFORMANCEmessage go away on its own (after clearing vent obstruction) though. good luck!!

 

Also, a little odd to me that it drove without the message for over 1k miles!