P1577 – Brake Booster Vacuum Sensor Circuit Low Input

P1577 Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P1577 Possible Causes

Faulty Brake Booster Vacuum (BBV) sensor,Brake Booster Vacuum (BBV) sensor harness is open or shorted,Brake Booster Vacuum (BBV) sensor circuit poor electrical connection

P1577 Description

The P1577 code is set when the Powertrain Control Module (PCM) detects that the Brake Booster Vacuum (BBV) was -8 kPa or less, conditions met for 2 seconds.