[sean5302]

Annoying me.
I've had a problem with the engine stop/start system not working.
I've changed the battery for a brand new BMW Varta battery AGM type and had it coded to the vehicle, a 2010 E90 diesel.
I've changed the brake servo vacuum sensor. Awkward job.
I've dismantled and cleaned the steering angle sensor disc under the steering wheel airbag. It was OK.
Still have the problem.

Now, I'm thinking it through, I realise that I only get the fault when I first move the car.
I put the key block in and start the engine. All OK.
I then move in gear and get a "bong" and the A in a circle ! alarm. The light stays lit for 10 seconds and doesn't come back until I finish the journey and take the key block out. All driving, braking and engine power are OK.

I suspect the ABS slip rings now, but it's getting silly. I could change everything on the car and not find it.
Any thoughts, please?
I don't have a code reader.

[Rich76]

Instead of aimlessly changing things spend twenty quid on a code reader and get a free app

If you have any stored fault codes it will normally stop the start stop from working