Warning lights

[Chet1967]

Driving home from work yesterday and the open bonnet warning came on and than the rest of the dash lit up like a Christmas tree. The light on dash switched off and headlights turn off when suppose to be lit. Same this morning when started the car can any one help with what's wrong

[Fore Left]

What car / year?

Such random errors are often caused by a failing battery. I'd start by getting it checked / replaced esp. if it's getting on a bit.

[Chet1967]

420d 2015 think it is the battery the stop/start doesn't work aswell for a month

[Mr Tidy]

I wouldn't be surprised if your battery is dying.

The AGM battery in my E87 123d with stop start didn't last 5 years. Back in 2012 Sytner wanted over £300 to supply, fit and code a new one, but I found an Indy who did it for just over £250.

Stop/start hardly ever operates when it's this cold, and will never operate if the battery is dying. The car monitors battery condition, current draw (heating/AC, lights, heated screen and seats and loads of other parameters) before it decides whether to allow it to stop.

You really need to get the battery voltage checked.

[RUSSELLM]

And ampage