Brake Pressure Sensor A/B

Where it lives

For C0046, start at the sensor the description names.

Check these first

• A failed brake pressure sensor or a mismatch between sensors A and B
• An open or short in the brake pressure sensor wiring
• Corrosion at the brake pressure sensor connectors
• Low or contaminated brake fluid
• A fault in the ABS or stability control module

What to do next

1. Inspect both brake pressure sensor connectors for corrosion
2. Compare sensor A and sensor B signals with a scan tool
3. Check brake fluid level and condition
4. Replace the faulty brake pressure sensor if the signals disagree
5. Test the ABS module if both sensors read correct but the code stays
6. Clear the code and retest

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