code 33 indicates a failure in pump circuit but refers to codes 31 and 32, they must all be related codes so....
code 31 says: faulty wire connections to D4P or T1P and T2P or pump driver board or failed logics, or any one of those components could be failed.
code32 says: same thing.
you will need the service manual to know the wire termination check points to check for, there are a few.
good luck
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