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Thanks Gareth. Got some money back from dealer, using the diagnostic report as evidence. Did a dpf cleaner run through the tank, it's not come on since, but there's numerous records on the obd of egr valve. Dealer paying for 40% of valve replacement (plus cooler) as I've had only 2 events since I had it and they should have checked it before sale. I don't want to cause any more problems to engine and emissions system by ignoring it, so going ahead this Wednesday.

Thanks Akash, please let us know how you get on.

Do you own this Colin, and do you have a handbook for it? If so, the wheel diameter options should be given there. My feeling is there will be a choice between 17 and 18 and possibly more. If you really want to know what it left the factory with then you will need to get a copy of the build record via. the VIN. Walking into a dealer Parts section may provide you with this. Regards, Gareth.

Also the strange noise from the egr after turning off is still there...even though it's brand new.

Hi everyone, I’m hoping someone here might be able to help me figure out the correct DPF pressure sensor for my car. There seems to be a lot of conflicting information out there. Car details: Model: Audi A5 Sportback Year: 2016 Engine code: CNHA-PVM VIN: WAUZZZ8T1GA054215 Background: The car has had a DPF issue before. In 2021, the previous owner had the DPF pressure sensor replaced and a forced regeneration done. The part installed at that time was 03L 906 051 B. Now, in 2025, I’m getting the same DPF error again (P2002 - Particulate trap bank 1 efficiency below threshold). I started looking for a replacement sensor and here’s what I found: PartsHaus.co.uk recommends: 04L 906 051 C or 04L 906 051 K Caffyns Audi (UK dealership) recommends: 03L 906 051 D The current sensor fitted: 03L 906 051 B As far as I understand, the CNHA engine is part of the EA288 platform and might not be fully compatible with the older “B” sensor. But I’m struggling to understand: Why are multiple different part numbers being recommended for the same engine? Which sensor is actually the correct one for the CNHA engine and why? Could using the wrong sensor affect DPF performance or trigger false regeneration cycles/errors (like P2002)? If anyone has dealt with this or knows how to verify definitively based on the VIN or engine code, I would really appreciate your help. Thanks in advance for your time! Marian

I’m now home and now I have the V5 I was able to check for tax, where the Autotrader say is was £20 per year and when I check another 1.4 UK car it shows £20/30 per year. now when I run this one it’s says it’s £220 per year, so this is because the euro stats and emissions are missing from the V5 🥱 ive gone back to the trader and asked them to get the V5 updated with the correct details as I don’t want to be paying that each year.

Just in... Dear Mr Masser, Thank you for contacting Ofcom recently about in-car DAB reception. I am sorry for the delay in responding to you. The relevant DAB network operators have been looking into recent issues with certain vehicle infotainment systems. Although the issue appears to be related to the behaviour of these receivers in the presence of certain valid signalling (which is compliant with the international technical standards for the DAB system), the operators are exploring options for mitigating the issue in the future. However, as the problem does not appear to be related to a technical fault or non-compliance on the part of the broadcasters, you may want to pass any further comments to the vehicle manufacturer direct. Spectrum Broadcasting Team Riverside House 2a Southwark Bridge Road London SE1 9HA www.ofcom.org.uk

Too late, foots already off!

Sorry for long post. I have a Japanese imported Audi Q3 Quattro 2014 Automatic with mileage of 62,000 and after approx. 1 month I noticed when I first got in car and pulled away there was a type of thud sound coming from rear it does it 3 or 4 times as I drive along then stops. It doesn’t do it again only on start up and only if car been sitting a few hours. I took it for a full service at Audi main dealership including replacing Haldex oil and nothing was found. My husband who is a mechanic for another main dealer has gone over the car and found nothing wrong and in fact both have said the car is in excellent condition. I did wonder if it was gear change thing as I when I start off, I go ridiculously slowly it doesn’t do it almost seems to start when car changes from first to second etc.. but nothing found wrong with gears etc. on examinations. There are no faults on computer of dash so I’m baffled. Don’t really want to take the car back as it is a good car in great condition. Has anyone else experienced this?

Alright, calm down...I'm not trying to make fun of anyone, but just to lighten the mood, as I'm trying to find a solution to my problem.

I am not a betting man but as with my experience, after changing the MAF and the light coming back on, the pressure sensor is the next suspect. I think the MAF is less likely to fail and I wish I had looked at pressure sensor first as was a fraction of the price.

I've got this error code popping up once in a while (probably 1-2 years now if not more) and never on cold engine, only when fully warms up + some driving on top of it. Can also notice a drop in RPM. Jumping from gear to neutral right before coming to a stop is usually when it feels like it's getting in the zone of stalling 500-600RPM it seems, but it never does, just jerks a bit, and RPM goes up again. But if I give it gas it will likely drop afterwards again when in neutral. Enabling A/C does help with RPM, it becomes more stable in situations like this. Anyone dealt with this issue before ? Also idk if related, but gas station pump clicks and have to keep nozzle halfway in to fill it up. My guess would be to look at EVAP system, but would it be even related to p1031 ? Engine: 2L FSI 110kw petrol.

Evening everyone. Just purchased a 2015 Audi S7 V8 450bhp petrol with 96000 miles, lovely car but has just thrown up the error on my ODB2 o2 sensor signal stuck lean; bank 1 sensor 2. Is this an easy fix to do at home, or a garage job? If it can be done at home where can i find it? Thank you.

Does it really need to be spelled out?

Often get multiple faults after disconnecting the battery. Need to leave it disconnected for about 30 mins. Usually clears after driving a couple of miles. If the airbag light stays on a useful fault code reader is OBDeleven that also resets fault codes. Basic version is about £50 and pro version about £80. Since dealers charge about £100 to run a diagnostic they are worth considering.

Think i have found the correct locations. The picture listed in the haynes workshop manual page 1A.10 calls this the filler but it looks to be the drain plug. The filler looks to be located higher up at the back of the gear box. The picture with the drive shaft shows the drain plug 17mm hex in the lower section. Other picture shows the filler plug just sticking out at the rear of the gear box. Will give this a go next weekend if the weather stays dry.

Update - received my obdeleven today and plugged it in. 3 persistent faults. MAF - understandable as unplugged Fault code 01314 Fault code 01592 Anyone think that either of these could contribute? Could 01314 be due to maf being unplugged?

Good. Your mechanic should have warned you of the potential for failure. Perhaps consider going elsewhere next time.

This might help but check the engine code https://r-techperformance.co.uk/axx-bwa-tfsi-k04-turbo-conversion/ Obviously it won't make the power on this website unless you add a whole load of supporting hardware. If you don't change the fuel pump at least change the follower if not already. Same with the PCV will most probably fail with more boost, rocker gaskets often go also. My TT has the KO4 from the standard since it uses the CDL engine. I got compressor surge trying to get past 350BHP so I had to get a better turbo and ditch the stock KO4

Maybe, but lack of coding can lead to the new battery being damaged by the charging circuits so I still suggest you get it tested.

I think this stage im just paranoid about my A6 , I've waited for years to get one as I could never afford one before in my life and I have now finally got the one I wanted " my dream machine " ( a 10 year old a6 I suppose some would say it's not much of a dream ) , but not that I have it im listening out for every knock and click and i find myself actually to nervous to enjoy it , with the fear of a major bill . And the thought of major gearbox damage has me actually sick to my stomach. I think it's time I just drive it and enjoy it , because it is a joy to drive . Thanks

That takes me back 50 years. I must have been mad, but I got away with it.

It’s asking me to press the clutch to start and when I do it goes off 🙂 don’t know if that helps

Thank you very much.

Fantastic work, hope you can get it back this week and enjoy it 🙂