Code 73, Pressure Control Solenoid: Notes

WARNING: This page is about a different car, the 1994 Cadillac Fleetwood. However, it is still accessible from the selected car via links, so may be relevant.

Pressure control solenoid is a PCM-controlled device used to regulate transmission line pressure. PCM compares TPS voltage, engine RPM and other inputs to determine proper line pressure for a given load. PCM regulates pressure by applying a varying amperage to pressure control solenoid. Amperage varies from 0.1 to 1.1 amps.

NOTE: Test numbers refer to numbers on diagnostic chart.

Checks ability of the PCM to command pressure control solenoid.
Checks for voltage at PCM.