Hi

Intake/Drain light flashing means an issue while draining. You would need to check for air gap on the dishwasher, it may be clogged. It prevents dishwasher from draining, sometimes the drain flow is restricted due to gunk. Cleaning or bypassing the air gap will resolve the issue. If this doesn't resolve the issue then it is due to seized (or stuck) drain pump. Disconnect the power to the dishwasher or turn off the breaker to the dishwasher. Tip machine on its back; remove screws that hold the bottom tray on. Remove the hoses to the main motor, remove electrical connections & remove motor (single screw holds motor, it is on the outside back of the machine). Try to rotate the motor (use WD40 is necessary). If you cannot rotate it, then motor will be required.
If the error still appears then cancel the error message, turn the rotary selector switch to "Stop/End" or press the "Start/Stop" switch for approx. 5 secs. Switch the appliance off and then back on again. Hope this helps... Please post back if you need more information.