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Discussion Starter · #1 ·
Hi, new member here, located in UK. I have had my CX60 since September. Mainly short local journeys in EV mode. Warning has appeared on dash telling me that the 12v battery is low, and to start the engine. I have done about 40 miles on engine only, but warning still appears with annoying sound that continues for 30 seconds. I connected a battery charger, and left it overnight, for two nights running. Warning still appearing. Help!
 

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I'm also suffering from this - I will try and59's solution.

I put a cigar lighter type voltmeter into the the socket and checked the voltages on the battery - Nothing wrong with the voltages - All within normal ranges.
 

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I'm also suffering from this - I will try and59's solution.

I put a cigar lighter type voltmeter into the the socket and checked the voltages on the battery - Nothing wrong with the voltages - All within normal ranges.
Thanks for your reply. I have a 12v battery meter arriving today. I had it booked in at Mazda dealers, but then warnings stopped, so I cancelled. Now it is back!
 

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Thanks for your reply. I have a 12v battery meter arriving today. I had it booked in at Mazda dealers, but then warnings stopped, so I cancelled. Now it is back!
I had my car in for a towbar fitting and asked for the problem to be looked into - I was told I'd had a software fix applied to resolve. My guess is the brake lights (and possibly associated electronics) when you turn the engine off are causing the voltage on the battery to drop too low - I will measure the impact later today.
 

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Thanks for your reply. I have a 12v battery meter arriving today. I had it booked in at Mazda dealers, but then warnings stopped, so I cancelled. Now it is back!
Checked the battery today, showing not fully charged. Ran the engine for a few minutes, meter then showed fully charged. Warning back on shutdown.
 

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Did you follow the suggestion from and59 - I've not had the warning since I started doing this.

What voltages did you get before and after?
I have seen suggestion from and59, I have done this with no success. My meter only has lights, fully charged one is flickering, but is steady after running the engine for a few minutes. Going back to dealer next week.
 

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I bought a CX60 on 12/22/22. For the first two weeks, the beeping of the 12V battery annoyed me in various ways. Then I drove about 2000 km in 3 days and the 12V battery didn't come back. I wonder how long it will last. Most of the time I drive an EV in the city. The gasoline engine works for me only occasionally.
 

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Near Huddersfield.

I’ve just been out to my car to x-ref the voltage my diagnostic tool reports vs the socket one I’ve got.

The good news, they agree.

The bad news, in the 45 minutes between parking the car and getting a reading of 12.7v the battery voltage had dropped to 11.9, which is low!

I’m going to hook up my charger to the 12v battery once the weather is good enough for me to go out.
 

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I have the MyMazda app on my phone. Will try and show text that popped up. I have a voltmeter arriving tomorrow. Steve, just in general where in the country are you? Screenshot is below.
I am in Warwickshire. Maybe a stupid question, does the CX60 have an alternator? I heard somewhere that some PHEV's don't have them. How else would the engine charge the battery? Unfortunately, I don't profess to be a mechanic. Seems that Mazda batteries are at fault. Never had battery trouble with my CX5.
 

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I am in Warwickshire. Maybe a stupid question, does the CX60 have an alternator? I heard somewhere that some PHEV's don't have them. How else would the engine charge the battery? Unfortunately, I don't profess to be a mechanic. Seems that Mazda batteries are at fault. Never had battery trouble with my CX5.
I don’t know if they have an alternator. You would expect them to have one. However in EV mode I think it’s a DC-DC converter that keeps the 12v battery topped up.

I’m wondering if it’s got enough grunt to deal with winter driving conditions. Heated seats, rear defroster, heated steering wheel and lights on.

I dread to think what the outcome would be if my driving required the ICE to be restarted several times a day.
 

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Discussion Starter · #18 ·
Mine is going in next Tuesday, be interesting to see what they come up with. Can't see them changing faulty batteries for the next three years. Mine has done less than 1,000 miles.
 

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So, according to my Ctec 7 stage charger, battery was fully charged. One journey later and the damned message on the dash again.

I beginning to think the battery is goosed.
I went to the service center with this complaint and yesterday they called me and changed my 12v battery. Until now, the message has not appeared. It seems that the problem is solved.
 

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I went to the service center with this complaint and yesterday they called me and changed my 12v battery. Until now, the message has not appeared. It seems that the problem is solved.
This morning, reading on voltmeter was 13.5 with engine off. Engine running it is showing 14.2. Had a thought. When I bought the car, the salesman told me that they had halted production of the CX5 to concentrate on getting the CX60 to market, and they were using what parts they could. Maybe the CX60 has the wrong battery? Have now run the engine for 5 minutes, turned off and the reading is 12.8, less than before. No annoying warning though.
 
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