Hello Bertrand,
I have not yet seen intermittent errors from the pressure feedback sensor, but if you do replace the sensor be carefull with the wiring as it is easy to trap between the cover and valve block...
I have seen broken springs behind the direction and range spools in this transmission, take the covers off and remove the vfs solenoids and pull out the spools to check, these can give you intermittent errors. Also I had one that had a pressure feedback error and traced it to one of the speed sensors, it had damaged wiring at the sensor.
Carry out calibration after repairs to check all is OK.
Hope this helps,
Steve.
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