Brake Booster Pressure Sensor Circuit

Where it lives

For P0555, the sensor sits on the circuit this code reports. The description of P0555 reports a fault at the sensor.

Check these first

• A faulty brake booster pressure sensor
• An open or short in the sensor signal wire
• A corroded brake booster pressure sensor connector
• A leak in the brake booster or master cylinder
• A control module or ABS module input fault

What to do next

1. Inspect the sensor and its connector
2. Check the sensor signal and ground circuits
3. Test the sensor output against a known pressure
4. Look for leaks at the booster and master cylinder
5. Replace the sensor if the signal is out of range
6. Clear the code and retest

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