Disconnect your washer from its power supply. If your machine is hardwired, cut the circuit it's connected to and lock your circuit breaker cabinet to prevent anybody switching it back on while you work.
Unscrew and remove the front support and toe panels at the bottom of your machine. They're just beneath your washer's door.
Put the screws in a safe place while you carry out your inspection.
Remove the screws securing your washer's turbidity sensor to the bottom of its tub with a Torx screwdriver. Again, put these to one side for safekeeping.
Pull the sensor out of its housing and examine its O-ring seal. If this is damaged, you'll need to order a replacement from Maytag.
Examine the sensor for any signs of scratches or damage. You'll need to order a new one if you find any.
Reinsert your sensor into its housing if everything seems to be in order. Ensure it's lined up correctly with its alignment rings.
If it isn't, it won't work.
Screw the sensor back into place, replace the toe and front panels, and reconnect your washer to its power supply.