Brake Pressure Sensor B

Where it lives

For C0045, the part to look at first is the sensor named here.

Check these first

• A failed brake pressure sensor B
• An open or short in the brake pressure sensor B wiring
• Corrosion at the brake pressure sensor B connector
• Low brake fluid or air in the brake system
• A failed brake master cylinder or booster

What to do next

1. Inspect the brake pressure sensor B and its connector
2. Check brake fluid level and bleed the system if air is present
3. Inspect the master cylinder and booster for leaks
4. Monitor the brake pressure sensor B signal with a scan tool
5. Replace the brake pressure sensor B if it tests bad
6. Clear the code and retest

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