Wynn's 29079 DPF & GPF On-Car Cleaner 500ml

My Audi A4 3.0 TDI (crtc engine code) was in limp mode with blocked DPF caused by faulty EGR valve, now replaced - so had 'drive fault' warnings on start up, cruise control inoperative, no performance. I have the vag-com / vcds cable and software so could see two fault codes, 5188 - particle filter excessive soot - and 5189 - particulate filter bank 1 efficiency below threshold.I warmed the car to normal temperature, removed one of the sensors in the 'upstream' / turbo end of the DPF after soaking it for a few days, then used the whole can of cleaner, spraying into every part of the filter that I could using the long hose supplied - obviously avoid any fumes / wear a proper filter mask. I followed the instructions to let it soak for 30 mins, then started it, let it idle then run at 2,000 RPM then test drive. Initially, no foam came out of the exhaust, unlike in the You Tube video, and at first it seemed to have had no effect. But on the test drive, still in limp mode, grey/black smoke started to come out of the exhaust, for about 15 minutes.When I got back, I cleared the codes, and the car was back to running properly; no warning lights, no limp mode, if anything it felt better than before. I checked the regeneration data and it had just done a 'passive' regeneration on the drive, which it won't do if the fault codes are showing. I was stunned; I was quoted £264 for an on-car clean, this seems to have fixed it for less than £25. Fabulous.

A lot cheaper than paying to have the dpf removed and cleaned. My dpf was blocked badly i put this in left it for 5 minutes then went for a 20 min drive it didn't work until I took the car out the next day for a longer drive then a big cloud of smoke came out and the car had full power again I have my own fault code reader and reset the engine light myself now the car is running perfectly again

Followed instructions, Did nothing, had some smoke when holding revs. That's about it. Still blocked, still have flashing glow plug light. Cleared faults, dpf faults came back, calculated soot mass after using 56.12g, soot mass before using 35.89g, so product only helps to block dpf more

Delivered as expected.

Done the job perfectly

Had an error code on my BMW 520d for the DPF filter, after a quick youtube tutorial decided to give the foam cleaner option a try. This stuff was excellent!! Very straightforward just shake and squirt, leave for 15 mins then go on a 30 minute run. Took the exhaust back pressure from 78 millibar at idle to under 10. Car runs amazing and MPG increased back to 45+mpg from 30 with a blocked DPF. Highly recommended A+++

Seems to have done the trick, squirt into the cat down through sensor pipe .Light on the dash as gone out now.

Used this on my 2020 transit custom , would not regenerate watched the video on the wynns YouTube channel easy to use and it’s done the job very happy .