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Dear Members, I seek advice, guidance with a hope to resolve the issue I have developed with my Audi A6 2.7 Avant (S Line 2010 Special Ed). I have searched on various threads and read a lot about this; however cannot find anything similar to what I am experiencing. Basically in a nut shell... Before I start, the car has always been serviced by Audi regularly, last one was last year April 2018. I am based in South London. DPF light came on and I had been driving the car for at most 2 weeks for short trips about 20 - 25 miles a day; however not long high speeds... just didn't get the time for a long drive. Knowing that I didn't have the time to go for a long drive, I decided to get the higher revs, I shall drive in Sports Mode so this may help a little. I had been driving around during the morning and in the afternoon upon a journey suddenly together with the DPF light, the Glow Plug coil light began to flash; I had never seen this before. Not long after, as I accelerated, suddenly I felt a huge loss of power and got really worried. As I gently pressed the throttle a little, I discovered that there was a bit of power, almost 5% and barely reached speeds of 20MPH unless I built up momentum. Unfortunately due to work and life pressures, I had to drive like this for a day and then spoke to a trusted local garage and gave my car to them. They like to spend their time, investigate, look at options, cleaning the dpf, replacing it etc. However, after connecting a variety of computer systems to the car, the garage was able to determine only a bit of info. When trying to access the channels, they could not and tried other VAG systems and still could not. The conclusion is almost that even if the dpf is cleaned or replaced; if the VAG cannot get through to the correct channels and talk with each other; it is a defeated task. So, is this a software issue, hardware, is there a password, has the dpf been damaged so much so that the channels have been blown?! Do the pressure pipes need changing, does the oxygen sensor need assessing... so many questions and not even sure if they are the right questions. Some info that may help: P2463 Diesel Particulate Filter Soot Accumulation - Upper Limit Exceeded P2002 Particulate Trap Bank 1 Efficiency below threshold: Implausible Signal I think the garage may return the car as they have had it for 3 weeks and have not been able to get past this hurdle. They are honest and have tried their best; if there are any last few things you could suggest which they could try; I can ask them to. Otherwise, what would you suggest please. Your advice and guidance would be much appreciated.

I am new to this forum so a big hello from me. I bought a Q5 2010 for my wife. After a while the engine light came on and the glow plug light and went to limp mode. Went to a mechanic and he said to leave with him he said it was a common fault and need to go on a VAG COM. he then told me it is coming up with Turbo and other things. After a few days I took it from him he said that he had cleared everything. But a problem keeps on continuing. while driving it went into limp mode when just kicking it a little on a motorway. The glow plug light came up and the car went into limp mode.  We then called the AA and he said that a sensor showed the air filter problem and it was dirty and he sorted it. and he drove it around it was fine. I asked my wife to drive it easy until i get it serviced which has been but now when she has accelerated it like 300 revs then the glow plug started flashing and going to limp mode again. When switched it off then it is better and no glow plug light. Can any one help please. Thank you Viq

Hi, All I am new to this forum so a big hello from me. I bought a Q5 2010 for my wife. After a while the engine light came on and the glow plug light and went to limp mode. Went to a mechanic and he said to leave with him he said it was a common fault and need to go on a VAG COM. he then told me it is coming up with Turbo and other things. After a few days I took it from him he said that he had cleared everything. But a problem keeps on continuing. while driving it went into limp mode when just kicking it a little on a motorway. The glow plug light came up and the car went into limp mode. We then called the AA and he said that a sensor showed the air filter problem and it was dirty and he sorted it. and he drove it around it was fine. I asked my wife to drive it easy until i get it serviced which has been but now when she has accelerated it like 300 revs then the glow plug started flashing and going to limp mode again. When switched it off then it is better and no glow plug light. Can any one help

Hi all, SQ5 2013 very recent problem. When accelerating hard, engine management light comes on and car goes into limp mode. Will not go over 3000rpm and other things like cruise control do not function. Once I stop and switch engine off and on again it’s back to normal, until I accelerate hard again. Had a quick diagnostic check at local garage and it came up with fault code U1113 shorted to ground? Would take car straight to my Audi dealer but they are so expensive and I don’t trust them with maintenance costs. Any advice greatly appreciated, thanks.

Hi Guys, So, I decided to put an aftermarket CAT BACK exhaust on my S3 8V and for 1000 miles it was amazing, truly amazing. Then suddenly, as I was about to embarrass a Vauxhall Corsa on the M1, my amazing S3 turned into a quivering wreck, EPC light on and power seemingly completely off along with the turbo. The sound of the car suddenly became very muffled and quiet. And the famously exquisite DSG !Removed!/ pop on upshift, well that sounded more like my nan plumping the cushions, flat, quiet and void of any substance. I took the car into Audi and they said "its because you put an aftermarket exhaust on it" as the fault codes read "EXHAUST BLOCKAGE", So then I took the car back to the exhaust place and had them replace it with the stock back box. And when I went back for the car the mechanic said, "There is a load of soot and grime in your exhaust right from the engine through to the back box", which was great news. And as a drove away with the car back to stock, the car STILL sounded quieter and did not pop but drove like usual. SOOOO.. I GO BACK TO AUDI, and they said "you have a cracked sump", they replaced that and cleared the fault codes...... 4 days later I pick my car up with no fault codes, a stock exhaust and a new sump and GUESS WHAT???????? The car still sounds RUBBISH. No one could explain the soot in the exhaust other than the Blaise service manager passing it off as "a natural process". I am furious as I have no answers and no clue what to do to make my car sound like it did before, popping and cracking like thunder. I can only think that it is because I drive to work everyday and it takes me 2 minutes, stop start. Am I knackering my engine by not giving it a chance to heat up? I drove it 100 miles yesterday in an attempt to clear out the soot but alas it has made NO difference. Please someone help me and tell me how I can resolve this issue! Thank you, James

Hello everyone. I am new to this forum and i hope i can share some valuable information and prevent a fellow Audi owner from spending a fortune for no reason. I have a 2008 Audi A5 3.0 TDI Quattro. Recently my DPF warning light began to come on and it only got more and more regular and i found that i had to take it for a blip down the motorway every other day. As you can imagine, eventually the dreaded glow plug warning light started to flash and it put itself in limp mode... I knew that now my dpf filter was so clogged up that it was surely a replacement job which i have been made aware can cost over £1,000 in bills. However, following some research i found a DPF cleaning specialist who use the very popular Terraclean equipment and were mobile. He ran some diagnostics and found my DPF had nearly 60g of soot and the pressure was between 10 and 13psi! =O. For those of you who do not know, the dpf pressure should not be more than around 3psi upon hard acceleration. The specialists words were "yep, it is f****d". He was not phased and got to work immediately. He connected his machine and all the pipes, set up the chemical they use and began blasting it through the dpf system. After 30 minutes a ghastly cloud of smoke and some grimy bubbles came out of the exhaust and the process had finished. At the end he reconnected his diagnostic equipment and the dpf was now reading 15g of soot and between 1 and 2.5psi upon acceleration, pretty much good as new. This entire process including him coming to my home cost only £250 and my Audi has never ran so beautifully! My word of wisdom here would be; do not run straight to the main dealer for DPF issues as they will simply charge you £1,500 to replace it just for the same issue to occur in another 30,000 miles. Find your local dpf cleaning specialist and have them clean it for you. It takes maximum 1 hour and will save you a fortune. Hope this is of some use to people =].

Basically when i change up through the gears theres like a weird whirling type noise that i can hear and when i hit over 3000 rpm the engine goes into a kind of limp mode and have no power untill i restart the engine and its back to normal? any ideas?