A3 1.6 diesel all warning lights on

[tim01]

Could anyone please help,  parked up last night all was well,  this morning started car reversed out then all warning lights came on , car drives but went to turn off and it kept running for a few seconds,  then went to start it and it wouldn't start but when I released the key it kept turning over until I turned key completely off and removed from ignition,  then it started fine next time but all warning lights are on . Anyone point me in the right direction of where to start looking please. 

[Magnet]

Welcome Tim.

First thing to eliminate is the battery.

Suggest getting its efficiency check - Halfords stores will do that. 
If it tests substandard then please refer back to us before committing to buy - if you have any respect for your wallet. 
Kind regards,

Gareth. 

[tim01]

Thank you,  I done this today and its fine, I tried scanning it but it gives no codes at all, in the display it firstly says TPMS then says brakes faulty which I have checked as best I can,  brakes work well, I should have said its automatic transmission,  if that makes a difference, 

[Magnet]

What were the actual % efficiency and CCA value on Halford’s test Tim? 

[tim01]

They didn't tell me just  said it was as good as a new one.

[Magnet]

Strange, owners normally ask for/ are given a print out of the results. Make and age of battery as a matter of interest? 
If the battery is genuinely up to specification, then it’s possible the the instrument cluster is at fault.

Kind regards,

Gareth. 

[tim01]

They didn't tell me just  said it was as good as a new one. The battery make is premium dated feb24

[cliffcoggin]

Was that new battery coded to the car? It's essential to do so to avoid spurious electronic faults such as false warning lights.

[tim01]

Yes it was done by audi

[tim01]

Problem turned out to be abs unit failed so not receiving codes from other units although brakes worked fine and car drove ok it put all dash lights on , had my unit repaired 

[cliffcoggin]

Thanks for letting us know.

[Andy_B]

On 1/3/2025 at 8:01 PM, tim01 said:

Problem turned out to be abs unit failed so not receiving codes from other units although brakes worked fine and car drove ok it put all dash lights on , had my unit repaired 

Hi Tim,

Could you let us know how this was diagnosed if no fault codes were present?

I have similar, though not udentical issue on my S3.

Andy

[tim01]

Local auto electrical company scanned it and found a lot of codes were read but some could not be read and when he checked all the codes it couldn't read were linked to the abs unit , it went off for repair and it's been fine since 

[Andy_B]

Ok thanks.

[cliffcoggin]

Please tell us the name of the company that repaired the ABS module.

[tim01]

I am afraid I don't have that information as it was sent off by the auto electrician that done my car 

[cliffcoggin]

That's a pity. The information would have been useful to others with a similar problem.