Ds5h 4 Engine fault stop engine message

[Megliam10]

Hi folks, DS5H 4
Pulling my hair out with this car arrrgggghhhh.
just got aux belt tensioner and belt replaced again after only 900 miles. Mot'd car and went out yesterday to get engine fault turn off engine message.
I replaced the battery approx 1 year ago and got it coded in but it is not storing charge. I have just replaced it again with a new Exide battery today but same message and no start conditions.
Anyone got an idea or had this prev. Love the car when it is driving but what a car for breakdowns lol

[GiveMeABreak]

I really need some fault codes to give some pointers, but beware if this is the drivetrain battery that has failed, as the whole unit has to be replaced.

I suggest you get it diagnosed with Diagbox and post any fault codes up here with your VIN.