mill a4

All three lights came on together when i started the car this morning, handbrake works fine, ???

iflywoe

it could be a number of things, from being low on fuel to an unplugged wire or connector, do you have vag com cable?

mill a4

No, dont have a vag cable. Not low on fuel and all other electrics working fine with the exception of parking sensors and ACC which now do not work.

Moviela

Without a sniff through the OBDII connector you are just guessing. Could be nothing more than a brief power dip in the chassis computer that threw up the flags.

It could also be a bad or open circuit from the speed sensor in the transmission, or tires that are more than .125" difference in diameter, a wheel speed sensor, or a weak battery caused by a failing battery, alternator not fully charging, or something in the car is draining the battery when parked.

Good time to dive into the trunk and be certain the battery is clean and tidy before winter.

You really need a cable look at the computer.

snagitseven

If the lights don't come on again, probably an anomaly as others have described. If they do, best bet, if you don't have access to Vag-com, is to have your dealer run a scan and to diagnose and correct the issue.
Still under warranty, yes?

mill a4

Lights been on 3 days now so booked into the dealer now for diagnostic check, hopefully the waranty will cover the repair

NPuter

Most likely, it isn't anything. They will probably clear the errors, see if they return, and take it from there. If they do not return, everything is fine.

mill a4

WELL!!! £200 later to fix an apparently loose wire, great, also parking sensors not working now so I guess it will be going back to Audi.