I have an 2006 Octavia 2.0tdi Pd diesel estate with 120k on the clock - used to be my company car doing 20~30k pa now retired its doing less than 8k mostly short trips. Recently when on the M25 suffered a severe loss of power, with engine going into limp home mode, pulled over turned engine off for few minutes then restarted all ok and was able to finish journey. On way home same thing - am assuming its blocked dpf filter but no lights showing on dash. Trying to run the car at high speed to regen just results in engine going into limp mode - can only assume its back pressure in the exhaust - but why no indicator lights?

Edited 29 June, 201511 yr by tyred60

strange if DPF a light would come on normally unless its been removed at some point

or the bulb on the dash could have blown a rare event but not impossible

Edited 4 July, 201510 yr by sgothuk

Wow, suprised to hear you even have a dpf on an 06, anyway... I never get any lights showing UNLESS the regen fails, IF it does fail a regen the secquence is; first light would be the dpf (exhaust symbol in dash display) second would be the heater coil light flashing and eventually it would go into limp, so I thinkn its probably not dfp isssue (assuming you have one). Get it scanned with vcds for any error codes and go from there. Mine normally starts to loose power and it feels like it got a slight miss at that point I make an effort to go for a hard drive up a 7 mile stretch of local motorway, keeping rpm around 2500 and speed around 60mph seems to clear mine out fairly quick, mines on 130k + and still on original dpf. Mind you it took me around 4 months to discover what was happening with the loss and miss I was getting each time, then I eventually found out about dpf issues and now I get the same issue around every 700miles, based on a mix of twon and very short ring road type driving. Best of luck and hope you find the issue.

Edited 24 July, 201510 yr by andybristol

Unless it's a vRS, Scout or 4x4 it won't have a dpf.

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Could be the faulty EGR valve ,Air Mass flow sensor or  dirty Turbocharger blades geometry.It's a quite possible also,a cracked vacuum tube for control of Turbo.Those are only speculations from my side!The best will be VCDS diagnosis 

Edited 29 July, 20169 yr by zar