How do you fix an E4 error on an integrated Kewood KDW243A dishwasher?

I have an E4 error flashing on my dishwasher. When I turn it on it makes a dreadful noise and i cannot use any settings. I have seen so many suggestions to tip it 45 degrees to drain water as its caused by a leak but I can't do this as its integrated. We managed to suck the water out of it using a turkey baster would you believe but it still has the E4 error. The machine is 5 years old and I dont know if it would be worth it to call out an engineer if its really expensive to repair. Any advice would be appreciated.