Possible causes

– Low transmission fluid level
– Dirty transmission fluid
– Faulty 1-2 Shift Solenoid valve
– 1-2 Shift Solenoid valve harness or connectors
– 1-2 Shift Solenoid valve circuit is open or shorted

When is the code detected?

When the Powertrain Control Module (PCM) detects a continuous open, short to ground or short to power in the 1-2 SS valve circuit , then the P0753 is set.

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)
– Transmission will not shift gears

P0753 PONTIAC Description

The 1-2 Shift Solenoid (SS) valve controls the fluid flow acting on the 1-2 and 3-4 shift valves. The 1-2 SS valve is a normally-open exhaust valve that is used with the 2-3 SS valve in order to allow four different shifting combinations. The solenoid attaches to the control valve body within the transmission.

PONTIAC Technical Service Bulletins for P0753 code