Hi David,

This is a common problem the coolant capillaries from the coolant temp sensor pin terminal up the individual wire so no sign in the plug. PSA fix change sensor and coolant plus the resulting damage...ECU!

I've thought of putting the CTS wires into another connector before the ECU to protect it should the CTS fail again, also check the electric thermostat wires but I think they terminate in the centre ECU plug.

hth

Rob