DC Fast Charging Not Working, Only Type 2 AC Charging

[Sebastian]

Hi everyone,

I own a 2023 MG4 Luxury (manufactured in December, 64 kWh battery, ~19,750 km) and I’m currently facing a serious issue:
DC fast charging no longer works — only AC charging via Type 2 (around 10 kW) functions correctly.

I’ve tested the car at multiple DC fast chargers from different providers, but none of them initiate charging.
No error appears on the charger or on the car — it just doesn’t connect.

A yellow warning icon (battery with a slash through it) appears on the dashboard.
Ever since this symbol showed up, DC charging has been completely blocked.

I scanned the car using Car Scanner, and here is the list of DTCs I found:

• P1FED(92) – High Voltage Battery System Fault (active)
• P1A12 – HV Battery Cooling System Fault (passive)
• U1900 – CAN Communication Fault
• U0401 – Invalid data received from ECM/PCM
• U0422 – Invalid data received from BCM
• U0131 – Lost communication with Power Steering Control Module
• U0151 – Lost communication with Restraints Control Module (RCM)
• U3000 – General Control Module Fault

Has anyone experienced something similar — especially this yellow icon combined with complete DC charging failure?
Any help or advice would be greatly appreciated!


Thanks in advance!

 

[Wudus]

When I had this fault of DC charging not working it was fixed by a software update at a dealers

 

[Martinonline]

Do you know what voltage your 12v battery has? I note that the driver's screen is showing a problem with that charging circuit.

With your car in a safe position, you could try disconnecting the 12v negative terminal for 10 minutes and then reconnect. That may reset all the modules. There is a set up procedure afterwards see the Wiki and the top of the forum.

 

[Ian Key]

As @Wudus said, your software needs updating at your dealers. Mine is under investigation at the moment because it won't charge on DC. One of the first things they did was to update several software modules relating to charging.

 

[Sebastian]

I updated to R59 and it still didn't work, but I went to the MG representative and they opened a file with the errors for me, which they sent to MG China. I'm waiting for them to call me to see what they decide.
Upon inspection, a cracked hose was discovered by the large antifreeze tank, they recommended replacing the hose, after which we'll try again to see if the DC charging starts. I'll keep you updated on what happens.

 

[mg4comfort]

I updated to R59 and it still didn't work, but I went to the MG representative and they opened a file with the errors for me, which they sent to MG China. I'm waiting for them to call me to see what they decide.
Upon inspection, a cracked hose was discovered by the large antifreeze tank, they recommended replacing the hose, after which we'll try again to see if the DC charging starts. I'll keep you updated on what happens.

Is the problem solved? How is it solved? We have the same problem.

 

[Gismo]

Cold comfort, but I have a similar issue.
Picked up my 'new' MG4 ER (it had just over 1000 miles on the clock, registered 30/06/25 and used as a demonstrator) three weeks ago and it charged fine on my 7kW wall charger.
Nine days after getting it we went on holiday and, as it was a 260 mile trip, called in for a charge on the motorway. It wouldn't charge a.t several of the Gridserve chargers (never had that problem with the LEAF that it replaced). Diverted to try at the hub near Buckfastleigh. Again no charge, but message on charger said 'vehicle requested charge stop'.
Called MG Assistance and they said AA would attend, but not until 6:00pm. So we cancelled their attendance and continued to our hotel, a total of 270 miles travelled. Called next day to re-arrange AA attendance.
Unfortunately, when the AA patrol arrived the charge was down to ~40 miles range and the gear selector only allowed P or N (not Drive or Reverse). They tried the 'disconnect the 12v battery and re-boot trick' - it didn't work. List of error messages now showing (starting with Charge Port Fault. but many others). AA arranged Relay recovery back to my local dealer and for a hire car for the next day (MH HS ICE, nice but thirsty). Holiday should have been relaxing but was ruined.
Dealer has had the car for two weeks - latest update 'problem discussed with MG and waiting for their OK to order spare parts'. I've e-mailed and asked for details of the 'problem' and what spares are required - no response yet.
As I've had the car for less than 30 days, I guess I could reject it, under the Consumer Protection Act, and claim a full refund (including all associated costs) but I was enjoying the car until it was, obviously, 'not-fit-for purpose'.
So, still waiting patiently and using the FIAT 600e they've loaned me.

 

[Gismo]

After 4 weeks the dealer has contacted me with an update. Seems that the problem was the Electrical Distribution Module and they have now received a replacement that they plan to fit early next week. So, 'fingers-crossed'. (But I'm still unclear why the EDM failed or why charging on 7kW/hr charging still worked at the dealership)

 

[Chrisdriving]

3 phase?
My model 3 had this issue.