Brake Pressure Sensor B Circuit High

Where it lives

For C0543, the sensor sits on the circuit this code reports. The description of C0543 reports a fault at the sensor.

Check these first

• An open or high resistance in the brake pressure sensor B circuit
• A failed brake pressure sensor B
• A loose or corroded sensor connector
• A broken wire in the sensor harness
• A fault in the ABS module input

What to do next

1. Inspect the pressure sensor B connector
2. Test the sensor circuit for high resistance
3. Check the sensor output on a scan tool
4. Replace the sensor or repair the harness
5. Clear the code and retest

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