Discovered that the issue lies with the ECU; upon inspection, there were evident indications of dampness and probable short-circuiting. We meticulously cleaned it with contact cleaner and a gentle toothbrush, then let it to dry. Reinstalled and launched promptly! Eliminate all error codes.
Regrettably, while driving it, it relapsed to a non-start condition, indicating that there are possibly more severe issues with the ECU than I had anticipated. Attempted a second cleaning, nevertheless the condition remains unchanged. The only alternative seems to be sending the ECU for repair.
Does anybody have recommendations for a suitable location to do this task?