2017~2021 Check Engine light code P2610

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Mazda CX-5 GT 2017
ECM Engine Off Timer. Intermediate issues with check engine light coming on. At first dealership thought the gas cap might be loose. 4 weeks later, 5 phone calls and 2 visits to dealership turns out the battery was in the red.

Battery replaced issue solved.

I do have a question though. If they can throw up a light on the dashboard to tell you your key fob is battery is low why cant they have a light to show your battery is low instead of check engine
 
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Mazda CX-5 GT 2017
Also I just wanted to add the dealership wanted $136 to diagnose the check engine light code before they did any work. So in my mind its stupidity not to have a check battery light. I talked my way out of the diagnosis charge but it seems really wack
 
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Mazda CX-9 Signature
My battery was on its last leg. when I tried to start the car, it skipped a beat before it was able to crank over. The engine light came on p2610. Car drove fine. Changed the battery, engine light went away.
 

yrwei52

2016 Mazda CX-5 GT AWD w/Tech Pkg
Contributor
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Plano, Texas, USA
I do have a question though. If they can throw up a light on the dashboard to tell you your key fob is battery is low why cant they have a light to show your battery is low instead of check engine
Yes that would be a good idea when the car computer detects the voltage of the car battery is low and display a message in dash. In my case I had trouble to release the EPB and triggered the EPB warning light when I started the engine the first thing in the morning. Once the battery got charged a bit with engine running and the EPB problem is gone. That’s how I know that I needed a new battery even though the battery had no problem to start the engine.
 
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2017 Mazda CX-5 GT, 2016 Mazda6 iGT, 2014 Mazda3 sGT hatchback
I replace the 12V battery on 3 yr schedule. No more than 4. It is <$100 at Costco unless you need Q85 (iStop, iEloop, etc.).

Strange errors/warnings show up when your 12V is not capable of powering the electronics/sensors.
 
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Winnipeg Canada
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2017 CX-9 GT
I just got that code on my 2017 CX-9 GT (posting here because this is where my search for the P2610 code brought me). I just got my car back from the body shop, where it sat for about 3 days. When I drove it home today I noticed the CEL and pulled the code. I suppose it could be a failing battery, hard to say.

And then there's this creepy YouTube video that explains this code specifically:
Unlock Switch Circuit High
Battery voltage must be between 9-16V
The BCM detects a short to voltage or an open/high resistance in the door unlock control circuit for greater than 1 second.

So this certainly jives with what people are saying above here (low voltage detected). However, my car was in the shop because someone broke into my car recently. Not only did they smash the glass, but damaged the window guides, interior door panels and the exterior of both the front and back door (they got in via the rear, right window). Anyway, the damage was around $3000 total. And my guess is they had to take apart the door handle to change out the parts. This may have triggered this fault as well. That's my thinking.

Anyway, I started the car again and the CEL is off. So.... I guess that's a good thing? If it ever comes back I'll post.
 
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erhayes

Contributor
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CX5 Reserve
I think diagnostic charges result form people using the dealer to find out what's wrong and then take the car somewhere else or home for the fix. Usually they drop the charge or reduce the fix charge by the same amount. I don't blame a Mechanic for that.
 
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