Vacuum Sensor B Circuit High

Where it lives

For C0550, the sensor sits on the circuit this code reports. The description of C0550 reports a fault at the sensor.

Check these first

• A failed vacuum sensor B
• An open in the vacuum sensor B circuit
• A poor electrical connection at the vacuum sensor B connector
• A failed brake system control module

What to do next

1. Read vacuum sensor B on a scan tool
2. Inspect the vacuum sensor B connector and wiring
3. Test the vacuum sensor B circuit for open and short faults
4. Compare the sensor B reading against a known value
5. Replace vacuum sensor B if the circuit tests good
6. Clear the code and retest

Look up another code