Audi A6 C7, stop/start unavailable

E46Dream

Hey guys, woke up this morning it was -4 degrees and started my car only to get a warning on the dash saying start stop unavailable. Does this sound like my battery hasn't got enough charge for it and I may need a new one or is it the fact it's really cold out right now. Currently letting the car warm up and defrost for a bit to see if that helps hopefully when engine gets up to temp.

Another thing that happened was my headlight washer jets were stuck out, most likely because I didn't have anti freeze in it and the water has froze....silly me. They should pop back in when it warms up according to the research I've done.

Moanin

E46Dream wrote: »

Hey guys, woke up this morning it was -4 degrees and started my car only to get a warning on the dash saying start stop unavailable. Does this sound like my battery hasn't got enough charge for it and I may need a new one or is it the fact it's really cold out right now. Currently letting the car warm up and defrost for a bit to see if that helps hopefully when engine gets up to temp.

Another thing that happened was my headlight washer jets were stuck out, most likely because I didn't have anti freeze in it and the water has froze....silly me. They should pop back in when it warms up according to the research I've done.

The start stop happened mine a few years ago and the EGR was knackered. Best top get it scanned.

Car99

Moanin wrote: »

The start stop happened mine a few years ago and the EGR was knackered. Best top get it scanned.

What engine is in yours? TDI ultra ?

Moanin

Car99 wrote: »

What engine is in yours? TDI ultra ?

2 litre tdi 177bhp

E46Dream

Mine is 2.0tdi 177bhp too. 66k miles on the clock. Hopefully it's not too serious car is still running not up to temp yet though.

Moanin

E46Dream wrote: »

Mine is 2.0tdi 177bhp too. 66k miles on the clock. Hopefully it's not too serious car is still running not up to temp yet though.

Mine was underpowered when EGR failed. It was also due to software upgrade re nox gases.

I advise getting it scanned to see what it is.

I think non activation of stop /start function will kick in for various kind of faults.

Car now has almost 300k kms (2011 first of C7)

E46Dream

Moanin wrote: »

Mine was underpowered when EGR failed. It was also due to software upgrade re nox gases.

I advise getting it scanned to see what it is.

I think non activation of stop /start function will kick in for various kind of faults.

Car now has almost 300k kms (2011 first of C7)

Yeah I don't have VCDS so I may wait for a bit I'd assume it's safe to drive right? Just don't use stop start. The button above the climate controls deactivates it doesn't it?

Also is there a VCDS that I can use through bluetooth on my phone? Where would I be able to purchase one of them?

Moanin

E46Dream wrote: »

Yeah I don't have VCDS so I may wait for a bit I'd assume it's safe to drive right? Just don't use stop start. The button above the climate controls deactivates it doesn't it?

Also is there a VCDS that I can use through bluetooth on my phone? Where would I be able to purchase one of them?

Sorry I can't help you with this as I'm not a mechanic.....

Maybe someone else will come on later that can offer advise.

colm_mcm

The most common reason for stop start not to work is the charging system or battery. Cold weather plays havoc on batteries. Don’t panic too much at this stage.

E46Dream

colm_mcm wrote: »

The most common reason for stop start not to work is the charging system or battery. Cold weather plays havoc on batteries. Don’t panic too much at this stage.

Yeah I'm going to take it for a drive later and hopefully it will clear the fault when it's up to temp

E46Dream

So just checked car is back to normal now my washer jets popped back in lol screenwash was frozen solid.

Stop start fault is gone now once the car got up to operating temperature, I guess it was the frost and freezing weather last night that played havoc on everything.

tossy

Start stop requires quite a few things to be within certain parameters to work, battery voltage , engine temp , ambient temp etc so i wouldn't be too worried on a very cold morning if it didn't work.

As for the washer jets popping up when frozen, get some decent washer fluid with anti - freeze in it to stop this as i've had a few cars where the hose to the jets split from freezing.

9935452

E46Dream wrote: »

Mine is 2.0tdi 177bhp too. 66k miles on the clock. Hopefully it's not too serious car is still running not up to temp yet though.

Out of curiosity what age is the car.
I know with bmws with stop start, when it stops working its normally the battery.
The batterys seem to last 5 years when they need changing because of this.
And would normslly last another few years in a different car

Truckermal

I disabled mine using Carista..