Hoping you may be able to help me out here.

My friend has an Audi A3 1.8T (I know this is the VW bit by the way but am trying it in here as its the same engine as the Golf), recently its been playing up which turned out to be the lambda probes.

I have replaced both, the one on top of the cat however was stripped of the wire coating (no heat shield) and the bare wires were pretty much fused together. Its still reporting faults with this probe so wondering if the bare wires would have blown something in the ECU.

Any thoughts/advice grately appreciated!