P0555

Brake Booster Pressure Sensor Circuit

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine Light Is On
Hard brake pedal
Reduced braking performance
Unstable idle
Dips during acceleration

Causes

Open or short circuit in the sensor wiring harness
Malfunction of the pressure sensor itself
Poor contact in the sensor connector
Problems with the vacuum brake booster
Engine ECU malfunction (rare)

How to Fix

Check wiring harness for damage
Inspect the sensor connector for oxidation or poor contact.
Check sensor resistance and reference voltage
Replace brake booster pressure sensor
Protest affectionate work of wuxi所й善 brakes efter repair

Related codes

P0556 P0557 P0554 P0509