Skoda Fabia Engine Light

vandriver

The wife's Fabia 1.2 htp has trouble starting sometimes,chugging at low revs 500 rpm or so.It then starts on the second or third go and drives normally.However,it throws up a engine light (not when starting,so possibly not connected) with a code P0420.This doesn't affect the driving of the car.We had the car in the main dealer for a diagnostic and they found a faulty temperature sensor which they replaced.
This seemed to sort things for a month or so,but the same code is back again now.
Any ideas what to look for?

AzureAuto

That code is related to the efficiency of the catalytic converter. I would suggest having the emissions system inspected for holes in inlet manifold tract and also the exhaust. Then test the vehicle on a gas analyser which will be very telling, and also check the voltage outputs from both pre and post CAT lambda sensors. A competent independent garage will be able to do all these tasks for a fraction of what the main dealer may chage.

vandriver

Premature Cat failure after injector failure.New Cat needed