The scanner is showing the ECU's interpretation of the data - hence some alarm bells when we started seeing what was being shown! (Scanner is fine - it's been used twice this morning.)
I do accept your point re. "random fault codes due to interference from plug and coil, hence the advice to replace / fit OE."
At the moment I'm happy with my repair recommendation to my customer: At £45.00 + VAT for an ECU test I think the cost / risk ratio is aligned more to the customer's interests than fitting new plugs and coils...
We shall see!
I'll keep you posted,
Andy
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