Possible causes

– Low transmission fluid level
– Dirty transmission fluid
– Faulty Torque Converter Clutch Solenoid valve
– Torque Converter Clutch Solenoid valve harness is open or shorted
– Torque Converter Clutch Solenoid valve circuit poor electrical connection

When is the code detected?

The P0771 code is detected when the ECM has detected a mechanical fault with the solenoid energized, valve stuck off

Symptoms

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

P0773 SUZUKI Description

Torque Converter Clutch (TCC) solenoid valve is turned ON or OFF by the Transmission Control Module (TCM) in response to signals sent from the park/neutral position (PNP) switch, vehicle speed and Engine Control Module (ECM) (throttle opening). Gears will then be shifted to the optimum position.