Help – Flashing tap light on NEFF S51E50X3GB/46

Please help I’m £80 for parts and none the wiser here……….

My dishwasher NEFF S51E50X3GB/46 beeped which would normally indicate it had finished a cycle, but it had stopped midcycle

On opening the dishwasher the tap light was flashing along with a steady light for the rinse aid and there was water pooled above the level of the lower large drain filter.

I’m technically astute so went through all the motions. I mopped out the water, inspected the drain motor impellar which rotated freely. I did find a small noodle near the impellar which I removed but this had no effect on the fault clearing. The reset function of holding the start button does nothing so I have no functionality to select wash programs

I inspected and cleaned the lower cabin filter. No issues found
Inspected and cleaned the aqua supply mesh filter again no issues.
checked the drain line for obstructions using retractable drain rods. No obvious obstructions found

I ended up replacing the aqua supply hose with the sensor built in, this had no effect

As a final hope i replaced the drain motor again no change the tap fault light still flashes away and i can’t select any cycles

I’m already £80 down in parts so if anyone out there is a professional tech I;d appreciate if you can help me out to get it correctly up and working again.
X-mas is a bad time not to have a dishwasher, I’m going to have to go old skool lol

Thanks in advance