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I forgot to mention, that was on from a week ago, cars booked in for egr/dpf ❌ on monday

i think i might have found a solution, i saw on the other post about the same problem that someone changed the part called "Lenksäulensteuergerät VW 1K0 953 549 DB Audi A3 Sportback 8P" in german. So i bought it and i waited for some hot weather so i can give you an update. And this whole week was over 30° with some days even being 34°. The car worked perfectly and had no problems. So it definitely solved the problem for me. Hope it helps someone else too.

You don't think the P2002 could be false because of the faulty battery Steve?

Hi never mind the battery the p2002 is going to cost some dollar to fix, get a quote first before spending any more money. Steve.

As has been suggested - just replace it with a quality branded one, get it recoded, and just don’t bother to get it retested elsewhere, but worth getting the alternator output checked. Regards, Gareth.

I’d probably get the matter resolved first and then insist on a meeting with the dealer principal.

If it is the original battery from 2015, get it changed any way. It is long overdue to be retired.

Perhaps a letter to the dealer asking for a refund would spur him into action. There is nothing like a demand for money for getting his attention.

I will take it to proper garage and have it tested again Thanks

It’s shocking that an Audi dealer can’t find the time to address a potentially dangerous issue on a 5-week-old car. I would imagine it didn’t take them that long to take your money. Anyway, glad to hear you have a tech on the case who seems to know what he’s doing. Good luck.

Thanks Joe, do you perhaps know if an engine top cover is available for my 2026 A3?

Engineer from Audi road service called but was completely baffled by the problem. He scanned the vehicle and found a number of "U" codes which he said means parts of the electronics were not communicating with each other. He was astonished the Audi dealer was too busy to look at the car especially as it is only 5 weeks old. He said he would contact Audi customer services directly as see what could be done to resolve the issue and to get the dealer to do the job they are supposed to do. I'll keep you posted on any developments.

If you’ve had S Tronic gearbox service (every 38k miles), and you have VCDS, then I would do gearbox adaption calibration in basic settings. Few videos as mentioned. Try than and see if any improvement.

If you’re going to the bother of doing transmission, then nothing wrong with doing front and rear diffs. They should be fine until 100k, but they only take 2-3 litres, so hardly going to break the bank. The Tiptronic box is a different story, 8 litres of special ATF.

Battery should be 12.4v minimum. If it’s original battery you’ve done well. Replacement is AGM type, and coded to the car, vented, etc.

The battery is not fine, it is almost dead. Ensure you get the new one coded to the car. I wouldn't trust the clowns at Kwikfit any more than those at Halfords.

Thanks Cliff I will have a look in yellow pages 👀

Audi A6 2015 ultra 2.0tdi auto: Was driving and had orange glowplug light come on, car immediately went into limp mode and engine light also on. Parked the car and turned it off for couple of min. Came back and when i started car the glowplug light was there but this time with orange airbag light aswell, still on after clearing. plus TPMS warning+ ESC came on for 5/10 seconds. First thing i did was get battery tested and was told its fine , LOWEST VOLTAGE: 10.18v ( not sure if this ok but was told by lad at kwikfit it passed their test) CHARGING TEST LOAD ON : 13.47 V PASS DIODE RIPPLE :0.11 V PASS What are your insights? (The p2002 has been on for the past week and car is booked in to get that sorted)

Not the cheapest, but reviews say its a good battery, but time will tell

As a first step get the battery tested on deep discharge testing equipment. A dying battery could be your problem.

My 2008 A4 Avant has decided that it does not like Hot Weather! Yesterday I went out it started fine but when it was time to retune home it would not start. The ignition came on but on turning the key all dash lights stayed on, with no clicking from the starter motor, as there is with a flat battery.. This is not the first time this has happened it did during the last "Heat Wave" but returned to 'normal service when the weather changed! Anyone got any ideas of what may be the cause?

As suspected, the central air flap motor is defective according to VCDS.

The usual problem is loss of refridgerant gas through a leak. I suggest you have that checked as a first step. Aircon specialists will probably serve you better than an Audi dealer.