What does code P1577 mean?

Q: What does code P1577 mean?

BBV Sensor Circuit Low Voltage. P1577 on a Chrysler vehicle indicates that the Brake Booster Vacuum (BBV) sensor circuit has been detected at an abnormally low voltage by the powertrain control module. The computer expects a voltage signal within a specific range that reflects the vacuum level in the brake booster, and a low voltage typically means the sensor is reporting little or no vacuum, or the circuit is shorted to ground.

DTC codes / Chrysler codes / P1577

P1577 · ChryslerBBV Sensor Circuit Low Voltage

P1577 on a Chrysler vehicle indicates that the Brake Booster Vacuum (BBV) sensor circuit has been detected at an abnormally low voltage by the powertrain control module. The computer expects a voltage signal within a specific range that reflects the vacuum level in the brake booster, and a low voltage typically means the sensor is reporting little or no vacuum, or the circuit is shorted to ground.

SystemPowertrain

Code typeChrysler specific

SeverityMedium

Fix difficultyIntermediate

AreaVehicle speed, idle control and auxiliary inputs

Guidance is general and written for Chrysler vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.