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hi i ha a dpf and glow plug and engine management light on in my A4 sline, i looked through the net to find advice on changing my dpf sensor..only to find it didnt sort my issue
I then took it Audi dealership, who told me i wanted a new DPF filter as it had reached 90% blockage. They wanted £1500 for part and fitting. After looking through the net again i found better info which had good feedback
It was a time consuming job but fairly straight forward to do on my A4...
I then stripped the DPF from the exhaust and cleaned it using neat Traffic film remover from the clean to the dirt side, to stop soot going back into the clean side. I used a guaze filter to help do this and repeated the process a couple of times. I then used a pressure washer with hot water to clean it out further till the flow was one to one i tried it best i could and re fitted to vehicle.
I took it on a 20 mile trip down the motorway, but the lights remained on at all times. On my way bag and upon exiting the motorway i had to stop at some lights where i turned off the engine and re started the car. THe glow plug light had gone off, i took it down a dual carraige way for another mile and back to a layby, after two more stops all the lights went off. My partner who normally drives the car has taken it for a test drive and says it drives better than ever.
As i said ealier i wouldn t ave done it if i hadnt seen posts from others who had done the same and reported back after a few months with no return of the fault. In the end its cost me my time, access to a presher washer and about 5-10 litres of neat detergent. Fingers crossed no more faults for us
Hope this helps you
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