P0559 Brake Booster Pressure Sensor Circuit Intermittent

OBD2 Code: P0559

Description: Brake Booster Pressure Sensor Circuit Intermittent

Definition: This code indicates that the vehicle’s powertrain control module (PCM) has detected an intermittent signal from the brake booster pressure sensor circuit. The sensor is responsible for monitoring the pressure within the brake booster, which assists in braking efficiency and safety.

P0559 – Brake Booster Pressure Sensor Circuit Intermittent

Typical Severity: Moderate

Common Causes

P0559 – Brake Booster Pressure Sensor Circuit Intermittent

Common Causes:

• Faulty brake booster pressure sensor
• Loose or corroded electrical connections related to the brake booster pressure sensor circuit
• Intermittent wiring issues in the brake booster pressure sensor circuit
• Software glitches in the vehicle’s engine control module (ECM)

 

Common Misdiagnosis

OBD2 Code: P0559

Description: Brake Booster Pressure Sensor Circuit Intermittent

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

 

Common Diagnostic Steps

OBD2 Code: P0559

Description: Brake Booster Pressure Sensor Circuit Intermittent

Common Diagnostic Steps:

• Check the brake booster pressure sensor for any visible damage or loose connections.
• Inspect the wiring and connectors related to the brake booster pressure sensor for signs of wear, corrosion, or disconnection.
• Use a multimeter to test the voltage and ground signals at the brake booster pressure sensor connector.
• Verify that there is proper vacuum supply to the brake booster.
• Test drive the vehicle while monitoring live data from the brake booster pressure sensor using an OBD2 scanner to check for intermittent faults.
• If no issues are found with wiring or connections, consider replacing the brake booster pressure sensor itself as it may be faulty.