C0550
Vacuum Sensor B Circuit High
C0550 is an OBD-II diagnostic trouble code meaning: Vacuum Sensor B Circuit High. Common causes: open circuit in vacuum sensor b, short circuit to power in wiring harness. Estimated repair cost: $33–89.
Symptoms
- Check Engine Light Is On
- Deterioration in braking performance
- Unstable engine operation at idle
- Reduced engine power
Causes
- Open circuit in vacuum sensor B
- Short circuit to power in wiring harness
- Vacuum sensor B fault
- Connection problems or contact corrosion
- Engine control unit (ECU) malfunction
How to Fix
- Check the integrity of the sensor wiring harness
- Measure resistance and voltage at the sensor
- Check the connections and contacts of the sensor
- Replace vacuum sensor B if necessary
- Test the operation of the system after repair
Related codes
Error C0550 by Vehicle Brand
FAQ
What does the C0550 code mean?
C0550 is an OBD-II diagnostic trouble code that indicates: Vacuum Sensor B Circuit High
What causes a C0550 error code?
The most common causes of C0550 include: Open circuit in vacuum sensor B; Short circuit to power in wiring harness; Vacuum sensor B fault; Connection problems or contact corrosion.
How do I fix a C0550 diagnostic trouble code?
To fix C0550: Check the integrity of the sensor wiring harness. Measure resistance and voltage at the sensor. Check the connections and contacts of the sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C0550?
Limited driving only, diagnose soon
How much does it cost to fix C0550?
The estimated repair cost for C0550 is $33–89. Actual cost depends on your vehicle, location, and labor rates.
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