Smeg integrated dishwasher model D1612C error message 2?

Broken down yet again and I fear the cost of another call out. All programmmes appear to rinse and then stop. Water is pumped in and out fully, but the programme does not progress to wash. Also water is leaking from the front left hand corner of the machine when it is rinsing. Error message 2 shows the lights in this order:
1 off, 2 flashing, 3 off, 4 off and 5 constantly light.
Any ideas?