I have a Peugeot 407 Diesel ('07)
The DPF filter warning light is coming on
I have tried the high-RPM-low-gear(4th)-down-the-motorway-for-30-mins trick, and that was after putting a bottle of this into the fuel tank
Should I try this a few more times?
Is the soot in the DPF filter going to gradually start breaking down each time I do the high RPM thing?
I was doing 3K rpm consistently for like 30 minutes so I was actually kind of shocked that it didn't sort it out.
How many attempts do these things take?
Do I need to put another bottle of DPF cleaner in the tank?