Busy day on the 'vert today. Topped off the fuel, changed oil, polished the chrome wheels, put tire shine on the tires, and waxed the car. Put a cover on it and now it's ready for winter.
Hopefully the next time I fire it up is for it's trip to Texas...
Update - a new 14 pin connector and wires have been spliced in and re routed away from the radiator hose. This seems to have solved the problem. The car is running great and the warning message and engine light are finally gone !