C0549
Vacuum Sensor A Circuit/Open
C0549 is an OBD-II diagnostic trouble code meaning: Vacuum Sensor A Circuit/Open. Common causes: broken wires in the sensor circuit, poor contact in the sensor connector. Estimated repair cost: $33–111.
Symptoms
- Incorrect operation of the brake system
- Check Engine Light Is On
- Reduced braking performance
Causes
- Broken wires in the sensor circuit
- Poor contact in the sensor connector
- Vacuum sensor A fault
- Wiring Harness Problems
How to Fix
- Check the integrity of the wires in the sensor circuit
- Clean the contacts in the sensor connector
- Check the functionality of the vacuum sensor A
- Replace sensor if necessary
Related codes
Error C0549 by Vehicle Brand
FAQ
What does the C0549 code mean?
C0549 is an OBD-II diagnostic trouble code that indicates: Vacuum Sensor A Circuit/Open
What causes a C0549 error code?
The most common causes of C0549 include: Broken wires in the sensor circuit; Poor contact in the sensor connector; Vacuum sensor A fault; Wiring Harness Problems.
How do I fix a C0549 diagnostic trouble code?
To fix C0549: Check the integrity of the wires in the sensor circuit. Clean the contacts in the sensor connector. Check the functionality of the vacuum sensor A. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C0549?
Limited driving only, diagnose soon
How much does it cost to fix C0549?
The estimated repair cost for C0549 is $33–111. Actual cost depends on your vehicle, location, and labor rates.
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