P0558 Brake Booster Pressure Sensor Circuit High Input

Definition: The OBD-II code P0558 indicates that the Powertrain Control Module (PCM) has detected a high voltage input from the brake booster pressure sensor circuit.

P0558 – Brake Booster Pressure Sensor Circuit High Input

Typical Severity: Moderate

Common Causes

P0558 – Brake Booster Pressure Sensor Circuit High Input

Description: The powertrain control module (PCM) has detected a high voltage signal from the brake booster pressure sensor circuit.

Common Causes:

• Faulty brake booster pressure sensor
• Short circuit in the brake booster pressure sensor wiring
• Corrosion or poor connections in the brake booster pressure sensor circuit
• Issues with the PCM

 

Common Misdiagnosis

OBD2 Code: P0558

Description: Brake Booster Pressure Sensor Circuit High Input

Common Misdiagnosis: Replacing the brake booster pressure sensor without checking for wiring issues or vacuum leaks.

 

Common Diagnostic Steps

OBD2 Code: P0558

Description: Brake Booster Pressure Sensor Circuit High Input

Common Diagnostic Steps:

• Check for any additional trouble codes that may be present and address those first.
• Inspect the brake booster pressure sensor wiring and connectors for damage, corrosion, or loose connections.
• Test the voltage at the brake booster pressure sensor using a multimeter to ensure it is within the manufacturer’s specifications.
• Verify that there is proper vacuum supply to the brake booster.
• If equipped, check the operation of any related fuses or relays associated with the brake booster system.
• If no issues are found in the wiring or connections, consider testing or replacing the brake booster pressure sensor itself.
• Clear all codes after repairs and perform a road test to ensure proper operation of the braking system and that no codes return.