Whirlpool duet front load washer flashes F35 shortly after start

Sud= The unit has sensed there is too many suds in the unit it will flush and pump out for 5 min and restart on its own..This is caused by too much soap use..
From the book :
SUD Code=
If too much detergent was used:
—Run the unit through a Rinse/Spin cycle.
—Run a Normal cycle without adding any detergent.
This should clear the unit of the excess detergent.
1. Check the drain hose and make sure it is not plugged
or kinked.
2. Unplug washer or disconnect power.
3. Check wire harness connections to the drain pump,
pressure switch, and Central Control Unit (CCU).
4. Check/clean drain pump filter of foreign objects.
5. Plug in washer or reconnect power.
6. Check drain pump.
7. Check the pressure switch.
8. Verify CCU operation by running a Diagnostic test or any
cycle.

I tried that fix and it did not work. The next step was to replace the analog pressure sensor, $168 with next day delivery. That fixed the problem, but the price is a ripoff and less than 4 year old washer should not need any repairs.
The part is a small unit with a small electronic circuit with a pressure switch.
I bet their cost is less than $10
1.Remove three screws on the back of the top.
2. Slide the top forward about half an inch and lift off.
3. the switch is mounted on the upper right.
4. Remove it from the side and slide the black cover up to make it easier to unplug the connector,
5. Remove hose.
6. Plug in new sensor and connect hose.
7. slide cover down and install unit.