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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 Experts, I have an Audi A6 2006 3.2 FSI Quattro, The Car recently Started showing the EPC Warning sign, whenever this happens in a few minutes the Car turns off, i had my eye on the Battery Status in MMI and whenever the EPC sign lights up my battery Starts Draining, When it reaches 0 it turns off and i have to Jump Start the car. Took it to a few mechanics to Find the issue and all they said was that it was the battery although i had my doubts, that's why i borrowed a New battery from a Friend to test it First and see. after the new Battery installation i drove it for about 2 days and got the EPC warning Again and noticed my Battery Status went from 100% to 70%. it has not turned off on me yet but i have a Feeling it will again. After the Recent EPC warning i Ran Diagnostics With VCDS and these are the Errors that it came up with. one thing to Add is that i noticed i Get the EPC Warning only When im Driving, If the Car is on park the sign Turns off. Address 61: Battery Regul. Labels: 4F0-910-181.lbl Control Module Part Number: 4F0 910 181 E HW: 4F0 915 181 A Component and/or Version: J0644 BEM H12 0590 Software Coding: Work Shop Code: WSC 02445 823 59480 Additional Info: 4F0915105C von VA0 1603160474 Additional Info: Geraet 59480 VCID: 234277A3E2C65F2660-8076 3 Faults Found: 02254 - Interface to Generator 004 - No Signal/Communication - Intermittent Freeze Frame: Fault Status: 00100100 Fault Priority: 4 Fault Frequency: 1 Reset counter: 88 Mileage: 251874 km Time Indication: 0 Date: 2017.02.06 Time: 11:34:38 00992 - Consumption Cut-Off Active 000 - - - Intermittent Freeze Frame: Fault Status: 00100000 Fault Priority: 7 Fault Frequency: 1 Reset counter: 255 Mileage: 251876 km Time Indication: 0 Date: 2017.02.06 Time: 11:40:22 02272 - Quiescent Current Stage 1 000 - - - Intermittent Freeze Frame: Fault Status: 00100000 Fault Priority: 7 Fault Frequency: 1 Reset counter: 255 Mileage: 251879 km Time Indication: 0 Date: 2017.02.06 Time: 11:49:05 Address 01: Engine Labels: 06E-910-559-BKH.lbl Control Module Part Number: 4F1 910 559 E HW: 4F1 907 559 A Component and/or Version: 3.2l V6 FSI 0070 Software Coding: 01050109190F0120 Work Shop Code: WSC 02325 785 00200 VCID: 2D56919BB4029956C6-8078 3 Faults Found: 002129 - Park/Neutral Switch Input Circuit P0851 - 006 - Short to Ground - Intermittent Freeze Frame: Fault Status: 00100001 Fault Priority: 2 Fault Frequency: 4 Reset counter: 39 Mileage: 251875 km Time Indication: 0 Date: 2017.02.06 Time: 11:36:59 Freeze Frame: RPM: 832 /min Mass Air / Rev.: 158.1 mg/str Temperature: 76.5°C Idle Load: 26.3 % Speed: 0.0 km/h 001109 - EVAP System P0455 - 009 - Large Leak Detected Freeze Frame: Fault Status: 00010100 Fault Priority: 5 Fault Frequency: 1 Reset counter: 40 Mileage: 251878 km Time Indication: 0 Date: 2017.02.06 Time: 11:43:54 Freeze Frame: Lambda: -1.0 % Temperature: 31.5°C Temperature: 81.0°C Speed: 16.0 km/h Time: 563.2 s Temperature: 592.0°C 001072 - Catalyst System; Bank 2 P0430 - 006 - Efficiency Below Threshold Freeze Frame: Fault Status: 00010001 Fault Priority: 5 Fault Frequency: 1 Reset counter: 40 Mileage: 251898 km Time Indication: 0 Date: 2017.02.06 Time: 13:51:16 Freeze Frame: RPM: 2304 /min Mass Air / Rev.: 305.2 mg/str Temperature: 82.5°C Part Throttle Temperature: 752.0°C Speed: 113.0 km/h Readiness: 0000 0101