Corsa-B.uk - Vauxhall, Opel and Holden Corsa B Owners Club

I'm getting a reading that I cannot correspond to a fault. It's on an X16XE with the 16-pin layout.

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1-4-10-5

This flashes repeatedly anyone got any ideas?

Sounds like you have a simtec 56.5 ecu
so that woulld be
EGR valve fault

try a clean or a new one,
have updated guide on how to clean in the FAQ section, check it out