Could I have prevented my Octavia's turbo failure?

I'm a taxi driver and I've got a 2010 Skoda Octavia 1.6 TDI. Whenever the DPF regenerates it blows a lot of smoke from the exhaust pipe. I eventually realised that I should let the regen finish before switching off the engine. Recently the turbo and ECU failed at the same time.due to condensation being on the ECU. Could this be linked to the smokey exhaust?
Good thinking to let the regen finish. Turbos usually fail because the oil feed pipe to the turbo bearing and oil return pipe from it get choked with carbon, reducing the lube oil supply. The turbo bearing oil seals can also fail. Oil seal failure is the most likely reason for your smoke and for the repeated regens to get rid of the soot in the DPF. This is why you are advised to idle a hot turbo before switching the engine off. I doubt that condensation on the ECU is connected. Your engine is highly susceptible to EGR clogging and it's difficult to get at, which is part of the reason for the high replacement cost.
Answered by Honest John on

Ask Honest John