Stevey Y

Hi if you get the DPF/EGR removed or deleted you will be forever getting dash warnings, no one has yet come up with a software that can delete the low pressure cooler which is I suspect the reason you are considering this route, please observe the following, if you remove the main EGR you raise both cylinder head temperatures as well as the turbo temperatures as the gas will be a lot hotter, this will also raise Nox1 emissions which the sensors in the exhaust stream will pick up hence the lights on the dash, I am pretty sure the code you have is p2002 particle filter bank one above threshold, the DPF is not itself blocked just the cooler, I have had a couple of these apart, also try and disseminate between the cooler and the main EGR which rarely gives trouble also might be worth looking at on site cleaning /mobile where they come to you and run cleaning solution through the exhaust system via the sensor hole on the cat. Steve.

Hi if its four wheel drive most definitely. Steve.

Hi Mark, the gearbox oil change is easy enough drain plug at the bottom filler on the side, the trick bit is making sure you undo the filler plug first as they tend to be a real sod to get out if you drain it first and then can't get the filler out you are up poo creek, the Haldex is a different matter as you need the kit with the filter and oil, a word to the wise Haldex pumps have a filter screen on the pump so its worth taking it out and cleaning, on replacement put new seals on the entry neck of the pump or it will leak. Steve.

Hi the rings are bonded to the unit, you may be better served going for used units as I should think new prices would buy you a seat on the next space shuttle. Steve.

Hi Gareth Jason would of known what was what, everything that could be useless or misleading all available from google. Steve.

Hi Eric, I totally agree with your guy, not done the job myself but watched it being done over about eight hours and the next day was the belt change, the rear most cam timing has to be spot on after removing the sprockets, get it wrong and you will end up with 100ks worth of scrap metal, I can see his train of thought, if it aint broke don't fix it, reading between the lines mechanic friend denotes either a favour or a very cheap labour rate, I can understand his reticence. Steve.

Hi I only changed over to OBDEleven as I now have a 2021 passat and apparently that is fitted with SFD software which blocks a lot of coding functions to stop people from activating things on the vehicle as you used to be able to do with VCDS,OBDEleven are the only outside diagnostic producers to have an agreement between themselves and VAG, so there software produces a challenge code to VAG main servers and if that code is accepted they issue a token to allow you to perfofm the function, therefore they have a record of every vehicle thats been interfered with which they pass on to the dealerships anytime a trade in reg pops up. Steve.

Hi Cliff they are on all later cars as the sensor lets the ECU know the temp of the returning fuel from the rail, this is because part of the returning fuel is used to supplement the level in the filter housing when the car is under heavy load, most of the fault codes that are thrown up by this sensor are either due to bad wiring or most likely air bubbles in the return where it can't read warm air. Steve.

Hi the mechatronic units normally suffer valve failure due to bad oil or as you said PCB failure, trouble is Audi tried to be to clever with the design and I don't think they ever sought the advice of ZF, lets face it they are the fount of all knowledge regarding automatic/ manual gearboxes and have produced most of the bullit proof boxes over the last ninety years but the manufacturers don't want to pay the design royalties, made me smile when you said about the reliability of the BMW units, where do you think they got their designs, instead we are left with the Ford power shift and multiple others that consistently fail due to inherent design flaws, PS Billericay boy myself and have many memories of walking through Hadleigh to get home because no taxi would take us out of area at that time of night, the reading will throw up the problems, as a rule that type of box needs a service every 30k or two years whichever comes first, with regard to purchasing VCDS you might as well buy OBDEleven it does the same as VCDS but at a fraction of the price and works on a credits system where as if you buy VCDS its all free but is around £300 for the basic, I just bought OBDEleven Pro that does all Audi,VW, Bently ,Porsche and host of others with a hundred credits for £100. Steve.

Hi its usually on the fuel return pipe from the fuel rail. Steve.

Hi it could well have been the mechatronics unit and you have said you have tried the reset which only works on a temporary basis, but at no point have you mentioned getting the vehicle scanned preferably with VCDS, you can also do a gearbox reset with the same system, I have heard a lot of this with well serviced cars but most people forget about gearbox services every 30k which are critical to the longevity of this type of box. Steve.

Hi could well be the breather on the rocker cover is becoming blocked so the gas will take the path of least resistance, dipstick/oil filler cap. Steve.

Hi Colin, if she is anything like my missus the nagging is off the Richter scale, please if possible post some pics, I imagine from your first post it could be something as simple as a bad earth. Steve.

Hi the milage is not so much of a worry as they do that with ease provided they have been serviced regularly, ask for any service history the main ones being clutch and timing belt changes as if there is no evidence at that milage they could be looming heavy expenses especially if the car is auto, having said that the best way is to have a diagnostic read out before purchase this will unearth any underlying problems. Steve.

Hi on the contrary, thank you for posting your resolution as it gives the other people who read this a chance, as so many people just fix the problem and never post the resolution, its like watching a really good film and the TV packs up fifteen mins from the end, I wasn't quite sure about the coding at first and then dredged my memory about the electrical shunt which I was told about a long time ago, it performs the way a can bus does by fooling the control module in to thinking its the original, this is also done on most aftermarket alternators to get round the coding drama. Regards Steve.

Hi is that really the best you can do, another YouTube video, I wouldn't mind but its not even the same suspension set up the video demonstrates Mcpherson strut suspension with a bearing turret top mount, Not static shock absorber with multilink pivotal hub steering, I am now convinced you are not even close to informed about what you are quoting and don't understand the dynamics of the suspension type on the posters vehicle.

Hi I doubt it will affect the car as the only reason the car will stop is if the ECU has been told there is no more adblue and the ECU shuts down the ignition, all the old pony about Adblue failure burning up the pistons is simply not true, how many owners are floating around out there with the adblue deleted years ago the whole system is gauged towards an emissions enforcement strategy. Steve.

Well I hate to point out that you would have to have the vehicle on a four poster ramp with the wheel off and a large pry bar to check if the bushes have gone soft or drop link travel, and if you could please explain why the topmount on this model fails, I await your empirical deliberations.

Hi David, you will often find the spare key battery is in a worse state than the one you use as the batteries run down quickly when not used, if you change the batteries in both fobs and still have the same problem the chances are that the pick up ring that circles the key port is intermittently not getting the right information from the transducer in the key fob. Steve.

Hi go find a decent independent if not covered by warranty usually around a grand. Steve.

Hi you wont get rid of this one easily its either the sensor heading east or my humble guess it needs a software update. Steve.

Hi try changing the key fob battery that is often the cause. Steve.

Hi Colin it would be better to establish if these are original headlights or retrofit/aftermarket, the way to do this is inspect the top of the units with the bonnet up, if they are factory there will be a sticker on top with the part code if thats present it may well be as simple as a wiring fault, please post some pictures that would be a great help. Steve.

Even if you are trying to fit an H4 bulb in to an H7 mounting, the mountings are completely different and so are the connections, one uses twin prong connections and the other uses try prong connections, while you are there why not think of something else he can buy as an ornament.

Hi from your description I would guess its either lower arm rear bush or a drop link or anti roll bar bushes. Steve.