Bosch WAN28281GB/38

This machine is only around a year old but was purchased as a damaged machine from an auction site so has no guarantee. The casing is a bit dented but it’s been working fine for around a year.
Now when you select a cycle it will start, fill with water but there is no motor action. I put it on a rinse cycle, it showed 13 mins and it filled with water then jumped to 5 mins and just did nothing. The door then will not unlock and you have to use the emergency door release to open it.
I’m thinking it’s something to do with the motor or the board but I can see a sensor, 10015047 attached to the motor and just wondered if anyone knew what sort of faults these sensors can cause.

Thanks,
Ray