P1771 Buick Shifting Position

P1772 Buick Low Coast Brake Solenoid Valve

Possible causes
– Faulty Low Coast Brake Solenoid Valve
– Low Coast Brake Solenoid Valve harness is open or shorted
– Low Coast Brake Solenoid Valve circuit poor electrical connection
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P1772 Buick Description

Low coast brake solenoid valve is turned