P1577 GMC - Brake Booster Vacuum Sensor Circuit Low Input

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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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

Possible symptoms

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

P1577 Gmc 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.
OBDII Code P1577 Gmc - Brake Booster Vacuum Sensor Circuit Low Input - AutoCodes.com

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P1577 GMC Comments

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