Brake Booster Motor A Position Sensor Circuit/Open

Where it lives

For C0587, the sensor sits on the circuit this code reports. The description of C0587 reports the sensor as open.

Check these first

• An open in the brake booster motor A position sensor circuit
• A failed brake booster motor A position sensor
• A poor electrical connection at the position sensor connector
• A failed brake system control module

What to do next

1. Read the brake booster motor A position on a scan tool
2. Inspect the position sensor connector and wiring
3. Test the position sensor circuit for an open
4. Compare the position reading against a known value
5. Replace the brake booster motor A position sensor if the circuit tests good
6. Clear the code and retest

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