P1577
Brake Booster Vacuum Sensor Circuit Low Input
Severity
⚠️ MediumCan you drive?
Yes, but get it checked soon
Approx. repair cost
$17–56 (est.)
Symptoms
- Hard brake pedal
- Check engine light comes on
- Reduced braking performance
- Unusual sounds when braking
Causes
- Vacuum booster sensor malfunction
- Open or short circuit in the sensor circuit
- Wiring Harness Problems
- Faulty vacuum brake booster
How to Fix
- Check the integrity of the sensor circuit
- Check connections and connectors
- Replace vacuum booster sensor if necessary
- Check the operation of the vacuum booster