Abs ecu

[Andypandy]

Hi all, thanks for adding me,
I have a 2015 c5 1.6hdi, I’ve been getting intermittent warning lights up, when I scanned car with diagbox I get communication error with the abs traction control, if I shut it all down let the car go to sleep it will randomly see the ecu, but not every time, I’ve had car to a Citroen specialist, he said needs a new abs ecu £2k+, so my question is, can a used one be set up on the car. Thanks

[Paul-R]

Before doing anything drastic like that just consider whether the battery might be at fault. How old is? Is the engine sluggish at all turning over when you start it?

[Andypandy]

The battery was the first thing that I changed. I have cleaned the connection on the pump, but still the same issue