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Hey everyone, hunting a bizarre wiring short on a 2015 Audi A4 2.0 tdi 190ps . and wanted to see if anyone has encountered this specific failure point before I strip the entire loom back. The Core Symptoms: The car was doing an excessive amount of DPF regenerations. On vcds calculated soot mass was always quite high measured 90% of the time is in the negatives which is impossible oil ash at 30g Checking live data showed a permanent 5.7V on the 5V sensor reference line. I got new dpf sensor.after unplugging lots of sensors i Swapped in a second-hand ECU, and the constant 5.7V remains, ruling out a blown internal ECU voltage regulator or bad remap / adblue delete If the reference pin at the back of the DPF pressure sensor is physically depinned/isolated, the operations of the pressure sensor return to normal functions (or pretty much normal functions). The Breakthrough: While troubleshooting, I moved/wiggled the main wiring harness inside the static plenum/cowl chamber (roughly 4 to 8 inches away from where it exits the ECU box). Moving this specific section instantly triggers clicking relays, flashes the glow plug light on the dash, and throws "overvoltage to glow plugs Current Conclusion: It appears a constant 12V supply wire (ignition feed or relay trigger) has chafed, melted, or cross-shorted directly into the 5V reference wire inside that wrapped plenum chamber bundle, back-feeding and overpowering the circuit. My Questions for the Forum: Has anyone seen this bundle short out inside the static plenum chamber before? Is there a sharp factory clip or edge inside there known for slicing the tape? Does anyone happen to know which specific 12V feed runs parallel to the 5V reference line in this exact stretch so I know what color wires to hunt for? Any wiring diagrams for a 2.0 tdi a4 190ps or past experiences with this specific bundle would be massively appreciated!

Not having confidence in main dealers is terrible, although I feel I was dealt with ok this time I would avoid main dealer like the plague..😅

To be honest just buy it from the main dealer. Probably less than you think and you know quality is good. You'll need tensioner pulley and water-pump too.

The battery is only a year old.

Great pics and trip. I did something similar a few years ago it was great.

Welcome to the forum you'll find the members on here are a friendly and helpful bunch 🙂

Welcome to the forum you'll find the members on here are a friendly and helpful bunch 🙂

So the seats look like they're from an allroad. The wood is darker than mine. Sorry to hear the ECU is missing. Hope it's found soon!

Single VIN is £169. If you have other Audis or VWs (works on Skoda, SEAT, Bentley and Lamborghini) then 3-VIN version is £222. You get different bundles. Get one with a plastic box, as the brains is the USB Hex-2 cable, so it keeps it safe. Order from Gendan. As mentioned - lifetime updates for the VCDS software. Occasionally the dongle hardware needs updated too. Regards the air-con flap, then scan car first to determine if it's motor or linkage. Either way you're going to be stripping down. Once you have an ID you can search YouTube to get location. Suspect it's not programming as such, but adaptation procedure once the new software is installed so everything works in sync.

Hi thats better I think a good spray with WD40 and then try twisting it, try left and right gently I have a feeling the end that goes in the filter cover has some sort of locking tabs. Steve.

Zac. It is not advisable to buy secondhand gearboxes for a car of that age, unless direct from a transmission reconditioning company. They will all be worn or damaged no matter what the seller tells you. Before buying any more gearboxes I suggest you get the car onto a diagnostic code reader to find out what is wrong. It may be that repair of the existing box will be cheaper than a reconditioned one or the purchase of another car.

That's remarkably cheap for a garage fitted wiper motor. I suggest you give them the job and save yourself the hassle of broken boot liner clips.

Hi everyone I have this wing which is in immaculate condition I have not got a paint code for it I’d like £40 because I don’t want to scrap it I live in Welshpool SY21 Powys wales not keen on posting had a very bad experience with it Really hope someone wants it

Hi if it stands for a long time the only thing that deteriorates is the pad sensor wires easy enough to replace and cheap enough aftermarket. Steve.

Myself and a friend put it on a lift to try and see if we could get at it but we couldn't. That's when I decided this was a job for a mechanic who had done a couple and he definitely went in from the top. Not sure how much he removed to get at it.

Hello Fred, Discounts are fine, but the all important aspect is how competitive the premium is before any discount is taken off. As with many others, I have alway run my renewal quote through the comparison websites to actually see how competitive it is. Regards, Gareth.

Congratulations Tim on the purchase of your superb new car. Enjoy it ! Also for your entertaining and descriptive post. Pleased it all went well. I too , like Ron, have also used DrivetheDeal once before. I have nothing but praise for them as I bought my first Q8 through them and they pointed me to the way of Audi Bury St.Edmunds where I bought my second Q8 and this present car. So Tim , take it easy for the first 1000 miles or so and then give it a blast somewhere.....and smile ! I was in mine with my Missus this afternoon and quite gently going round a roundabout before I took a turning off which goes up a quite steep incline to the town of Romsey. It was a dual carriageway and quiet so I switched the car into the dynamic setting, the valves opened, steering and suspension firmed up, the exhaust crackled and I gave it a blast and I'm still smiling now ! There's still a little bit of a boy racer in me, even at the age of 78 years and I cannot wait till we depart for Deutschland in October and play with our German brethren on the unrestricted part of the autobahn network. Tim, it looks as though you have specced the car very well as it's almost identical to mine minus the adaptive dampers. And I only specced those as I was coming out of a Q8 with air suspension. Finally, I know you mentioned that the car is in Mythos Black and can be difficult to keep clean. Not sure if you have already gone down that route with previous cars but have you thought about a ceramic coat for yours ? I first had one applied to my first Q8 and was so impressed, had the second Q8 coated and now my S5 Avant. Worth ever penny in my book. So, enjoy the car and keep in touch. Frank

As a new member does anyone know, and have experience of a B5 RS4 Specialist in the north east of England? I'm aware of Unit 20, but they are across near Liverpool and it would be useful if there is someone closer?

Not of any interest to anyone?

VCDS will pinpoint. Generally speaking, usually glovebox out to locate motor. Anyway cross that bridge once you get it scanned.

Salut ai mai rezolvat problema am si eu fix Asa problema mersi mult

It needs to be done using a decent code reader & diagnostic machine. If you don't have access to one, most garages and battery suppliers will be able to do it for you.

Yeah I will just change everything, from what I can see it look like it might be coming from the plastic flange bit that connects to the egr cooler, I think there is another plastic piece behind that aswell (back towards the inside of the car ) but not sure what that's called

Hi its obviously in its early stages, the reason it is slipping in higher gears is because of the torque load in higher gears, it used to be the old way of testing the clutch, find a nice hill and change up to early floor the throttle and if the clutch was good the engine would labour, if not it revved up, I would get it checked ASAP as when the clutch slips it creates a phenomenal increase in gearbox temps and cooks the rear crank seal which is a whole different story, having had it happen to me I can say its not a good day out. Steve.

Don. If you can smell the coolant it must be escaping somewhere, though at a mere 1500 miles per year the loss may be so small that you don't get a warning before the garage tops it up during annual servicing.