Vcds faults

[Horlix66]

Hi all

So I have had a vcds scan on my A3 3.2 and it has thrown up a few issues...
I am however a little confused how to procede now - a few of the things are nominal, and I'm not bothered about, also I have fitted an aftermarket head unit, so I'm assuming that is why that has flagged up.

1. 00668 Low voltage seems to be a common issue - does that simply indicate I need a new battery??

2. 19061 Lambda sensor is what I expected/hoped to find (i have had the engine management light lit up for a couple of weeks now), but what is the glow plug issue (18025) ?

3. 01274 The air flow flap mechanical failure intermittent - is that just a case of requiring a strip down and clean ?

4. 00526 It shows my brake light switch has a bad ground/short - what can I do about this?

Any help where to start would be appreciated

 

[Horlix66]

Also I have had an issue the past few mornings on the way to work (seems to only happen when the air temp is cold)
If I am driving with fogs on and switch headlights to high beam everything cuts out momentarily, before kicking back in and flashing the major Brake System Warning Light....

could this be related to the low voltage issue?

 

[Raiden]

1. 00668 Low voltage seems to be a common issue - does that simply indicate I need a new battery??

I had that issue. And the dash kept saying ESP faulty so changed the battery and job done. Sorry but can't help on the rest

 

[-Ju-]

My old 3.2 A3 used to show the glow plug fault from time to time, could never understand it and it never caused any issues