P1773 Buick Problem in A/T Clutch Pressure Control Solenoid Valve B Circuit

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

Tech description

There is a service bulletin for a various Models with the RE5R05A transmission.
Factory Service Bulletin OBDII Code P1774 Buick

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)

P1774 Buick Description

Low coast brake solenoid valve is turned