your first Google search will have probably showed something like this:
http://www.wm1.com/whirlpool-washing-machine-fault-codes/
Cause is probably a faulty water supply - tap not fully on, kinked or crushed hose, choked inlet strainer in the hose end, failed inlet valve, etc.
Examination of the machine and more Google searching for yourself will probably shed more light.
acp, May 2017