Got the dreaded dpf light and coil flashing light on the dash. Have tried the dpf foam cleaner, driving high revs on motorway but no luck. Error code is P2458. Mechanic had a look and said i need new pf and new cat. But i'm struggling to find much info about the dpf/cat replacement. Been quoted about £1500 to fix. Just want to make sure no other options before biting the bullet. Was thinking about mobile dpf cleaner, but think its gone way past that option. Any info appreciated.