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P1577 CADILLAC - Brake Booster Vacuum Sensor Circuit Low Input

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
What does this mean? What does this mean?
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1577 Cadillac 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.

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