P0555 Brake Booster Pressure Sensor Circuit

OBD2 Code: P0555

Description: Brake Booster Pressure Sensor Circuit Malfunction

Definition: This code indicates that there is a problem with the brake booster pressure sensor circuit, which could be due to a faulty sensor, wiring issues, or problems within the brake booster itself.

P0555 – Brake Booster Pressure Sensor Circuit

Typical Severity: Moderate

Common Causes

P0555 – Brake Booster Pressure Sensor Circuit

Description: The powertrain control module (PCM) has detected a malfunction in the brake booster pressure sensor circuit.

Common Causes:

• Faulty brake booster pressure sensor
• Broken or shorted wiring in the brake booster pressure sensor circuit
• Corrosion or poor connection at the brake booster pressure sensor connector
• Issues with the PCM related to the brake booster pressure sensor circuit

 

Common Misdiagnosis

OBD2 Code: P0555

Description: Brake Booster Pressure Sensor Circuit Malfunction

Common Misdiagnosis: Replacing the brake booster or pressure sensor without checking for wiring issues, vacuum leaks, or a faulty ABS module.

 

Common Diagnostic Steps

OBD2 Code: P0555

Description: Brake Booster Pressure Sensor Circuit Malfunction

• Check the brake booster pressure sensor for any visible damage or disconnection.
• Inspect the wiring and connectors associated with the brake booster pressure sensor for signs of wear, corrosion, or damage.
• Use a multimeter to test the voltage and ground signals at the sensor connector to ensure they are within specifications.
• Verify that there is proper vacuum supply to the brake booster by checking vacuum hoses for leaks or blockages.
• If equipped, use an OBD2 scanner to monitor live data from the brake booster pressure sensor and compare it against manufacturer specifications.
• If necessary, replace the brake booster pressure sensor with a new one and clear any stored codes using an OBD2 scanner.