Both my Saturns,2002 L300 /with 200K and 2003 LW300/with 80K occasionally turn on the wrench light with the accompanying hard shifts. They are fine after turning off the key.
The consensus is that it is probably the Pressure Control Solenoid. Does the solenoid stop working properly or are they not right from the start? Poor design ?
Are the replacements better ? Does the solenoid provide variable pressure depending on the conditions?