I’ve had the car just over a week, I was out for a drive an had a “Charging System Malfunction” Error, pulled in, car on and off again and the error has gone.
I’ve had the car checked over today, battery in exellent condition, alternator charging as it should and no visible issues with the wiring.
There are two error codes…
P2502:00-28 Charging System Voltage
P0A8D:00-28 14 Volt Power Module System Voltage Low
My understanding is the DC-DC Converter could need replacing to fix the issue. Is this something Mazda do as part of a call back problem? It appears they do on other models of car with similar issues.
Any other ways to fix it? Anyone with similar experences?
I have seen this reported a few times, suggested options have been:
Check the battery connections and make sure they are tight.
Battery health check/replacement,
DC/DC Converter replacement.
For the DC converter I also read somewhere corrosion on one of its connections can be part of the issue, I don’t know how viable it is to check and clean these.
I have seen DC converters online for much less than the official parts network will charge, however unknown history etc..
I haven’t heard of Mazda contributing to this however there is no harm in asking.
The fault seems to be particular to 2019 models. If you have had the car for just over a week you should have some comeback with the seller. They would have known about the fault before they sold the car to you. If you get a dealer to replace it it will cost £1000+ to have it replaced. There have been a number of people on the forum with this issue (just do a search on DC/DC converter). This is a known problem to Mazda, but I have not heard of anyone (including me) getting a replacement with a “goodwill” contribution from Mazda, which is a poor show
I have had it checked over by a local garage who have said they can see no issues other then the error codes posted above.
I’ve emailed Mazda, figners crossed they are able to point me in the right direction. It seems like a very strange issue to have with a car and one you would want to sort out as a car seller, this kinda ■■■■ gives you a bad name.
“I note from the detail of your email the concern related to a charging system malfunction. I have checked our system and I can confirm there are no outstanding recalls for your vehicle and therefore the repairs would not be covered by Mazda Motors UK as it is not a recall item and the vehicle is outside of our manufacturer warranty period.”
Bad form, they appear to have the same issue on other models of car that are on recall.
As ND12 says they should take back the car with a full refund or repair the car FOC. This is not a wear & tear issue but a faulty design issue and an existing fault on cars of this age. The DC/DC converter was revised by Mazda as a result of this problem. If you get it replaced you need to ensure it is replaced by a new unit and not another of the same design revision (I think that the latest revision is E). The problem with your car is only going to get worse, as I found out. The dealer you bought the car from could take it up with Mazda UK but I doubt they would get anywhere. Simple answer is, they give you your money back, replace the car like for like or repair your car FOC. It would be interesting to know who the dealer you bought the car from is?
Yes apologies if it is no clear - I did not get the car from a Mazda dealer, its a pretty standard second hand car dealership. I’ll struggle to replace the car like for like in any way.
I don’t want to replace it to be honest, I really like it and got a good price on it concidering the age/milage. It’s all good apart from this error.
What is the worse case on the error? What is the actual issue with the DC/DC converter.. is it not charging something correctly?
I don’t think it would be a good idea to tolerate the error. It is only going to get worse. I think the minimum resulting issue would be a constantly flat battery and other problems with voltage sensitive systems due to the low voltages being generated. You could check with a Mazda dealer as to what problems might result from the fault. You really need to get it sorted. I have seen secondhand DC/DC converters on eBay if the dealer you bought the car from do not want to replace with a brand new unit but as I stated I think that it needs to be a revision EDITC or D unit at least. The dealer has sold you a car with a significant fault so it really is up to them to put it right.
I did when I was having the problem but it didn’t make any difference. From what I can gather this fault seems to be endemic on 2019 cars. i.e. the first cars fitted with the iEloop system.
I had a 2019 car where it threw the warning a few times on one journey and after removing and retightening the battery connections didn’t do it again in my ownership. I had the car another 4 months after that. May or may not be a longer term solution, has to be worth a try though.
