Stevey Y

Hi I am pretty certain only three but if those readings were taken when the car is up to temp sensor 1 is definitely on its way out as it should be reading the same as 3 and 4, had this recently on a Q3 same system and two started showing a reading when I replaced 4 which was weak therefore the car would not regen properly and was chucking out black smoke, its all stopped now and will be getting a new EGR valve next Monday. Steve.

Wrong no amount of software updates will clear P2002 its the low pressure EGR cooler that is blocked with gunge and depending on how many miles you have done will need cleaning or in most cases replacing, the adblue crystals in the exhaust stream mix with the water vapour from the PCV and form a glutinous white syrup that rots the cooler tubes out, if you want realtime views and pictures I posted loads on the C7 forum, they basically want to charge you for the update if it exists then charge you again when It doesn't work somewhere in the region of £3000 for parts and labour, P2002 is a static failure that can only be rectified by having new parts I had this job done three times in 270k on my A6 [same engine] and its truly horrible job. Steve.

Hi no the manufacturer is legally obliged to inform the government of any recalls which are then posted on the gov.com website to warn of any potential safety issues as for the lock out any proactive garage should have a diagnostic platform to read the car apart from which the fire wall only exists to prevent people from activating things that are dormant but fitted to the car also remaps and what is known as tuning, it should still read DTCs, shame you did not manage to get the code that would have told you what it was straight away, AA didn't give you a printout with the code on it?. Steve.

Hi thank you thats the grandad of the CNH series engine which brings up the other problem that engine suffered which was EGR blocking or staying open check the operation of it on live data. Steve.

Hi trim removal kit made of high density nylon, loads of them on eBay just dont buy the really cheap set cos they bend to much, you will also find replacement clips on eBay. Steve.

Hi the only problems that occur with adblue crystals is when its out of the container thats over two years old or its been sitting in the car for over two years which is nigh on impossible, any way whatever you get treat it to a bottle of crystal dissolver [Forte] is good, these cars do not like cheap adblue and especially supermarket fuel, if you want total peace of mind with adblue buy a Peugeot or a Citroen they use pats fluid, ELOYS. Steve.

Hi not trying to cost you loads of money but the only two worth considering are Bosch or NGK believe me I had two aftermarket units on my car which failed in short order, if you can get them off eBay all well and good the part number is on the side of your existing unit so that gets you in the game, try partsinmotion on eBay or the net, I strongly suspect your unit is gone as I found they usually last between 80-100k. Steve.

Hi the best all round additive for keeping everything clean inside the engine including the DPF is a rather clever product called Dipetane it comes from Ireland and has rave reviews I started using it a couple of years ago, its a Hydrocarbon that is added to the tank and makes the soot particles in the DPF burn off at a lower temperature so after using it nearly always get 5g measured and about 6g calculated, Google it, on eBay its around £20 for two litres versus the Hydra at about £26 for a litre. Steve.

Hi you either access it via the wheel arch liner but your one looks like its the take out the headlight unit. Steve.

Hi its a get you out of trouble screwdriver, it should have a plastic handle somewhere, they are pretty useless you will be better off buying a little Draper 1/4 drive socket set and a US Pro 1/4 drive torx set for around £50 for both that covers just about every fixing in the engine bay. Steve.

Hi most of the engines from 2013 late to 2018 share a generic design as about late 2015 they were given the CNH designation the turbo and exhaust configuration has always been the same but if you could post a picture of your engine minus the cover that will help a lot, and the VCDS should be more than adequate. Steve.

Hi just replace it they are cheap enough and at the top of the engine bay, easy peasy. STEVE.

Hi Gas costs money so if you only fill it half way by the end of the day if you have done say 10 re gas the last two would be free to the company, typical Kwik Shat policy. Steve.

Hi yes use a proper nylon trim remover the clips do require some action. Steve

Hi there are three sensors one after the turbo another after the cat and yet another on the exhaust after the DPF, dont know what diagnostic system you are using but you should be able to pull up all three and any sensor that throws up a fluctuation that goes into minus or 00 is dead I would also get another MAF sensor as these often start the problem you have, if its any help there is a post on the C7 forum from a couple of years ago under Big Townz, I posted a lot of diagrams on it if you can't find it I am sure if you PM Magnet the wizard of the forum he will be only to happy to point you in the right direction. Steve.

I hope you give your bank account some pain killers before you pay.

BTW no fifth injector, the engines are post injection strategy for regeneration.

Hi never mind the live data for the injectors, if the car has done that sort of milage the most likely candidates are, MAP, MAF sensors the MAF very rarely throws a code even when knackered, most important are the EGT sensors as if they are bad they will cause the ecu to massively overfuel the engine as a bad EGT will sometimes give minus readings so the ECU thinks its way to cold in there so it humps in another bucket of diesel, hence the smoke, also check your soot loadings if the calculated is way higher than the measured one or all of the above will be your problem. Steve.

Hi from my perspective you would be better off with the original D2s the service life for LED units aftermarket is probably less than the HID because %99 of them are Chinese and for some peculiar reason have cooling fans attached to them, the D2s works straight out of the box, LEDs do create more heat and annihilate the beam pattern, So if you want a cheeky upgrade go for 5000-5500 kelvin D2s no extra heat just a whiter light, try Vally Lighting on eBay, I used their D5s units, fair price and only got a bit dim after two years and 100,000 miles [cab working nights]. Steve.

Unfortunately this is not a problem that will be solved without a diagnostic scan. Steve.

Hi its likely the supply pipes have collapsed but I would try to listen to hear if the pump is buzzing when you activate the washer system if it isn't its probably the main pump blocked or knackered. Steve.

Hi I believe you have two of these on your vehicle, problem is on that type of code reader it wont distinguish between sensor one and sensor two, if you can find someone with VCDS or similar that may well enlighten you. Steve.

Hi I think someone has been having a play and got into the green menu, engineers only, if you go randomly pressing buttons in that you will fry the MMI and no it wont need an update as the final updates available would have been four years from the build date. Steve.

Hi I think you will find its number one cylinder if all cam pulleys are lined up with their marks same as when changing the belt but use the old rule of check twice do once. Steve.

Hi well done, most early 90s Porsches had VW Scirocco stalks on the wheel. Steve.