OBD
U043F
Invalid Data Received From Vacuum Sensor B
What it means
U043F means Invalid Data Received From Vacuum Sensor B.
Where it lives
For U043F, the part to look at first is the sensor named here.
Check these first
- A worn sensing element inside the Vacuum Sensor B
- A calibration fault in the Vacuum Sensor B
- A fault inside the Vacuum Sensor B
What to do next
- Scan every module and record the stored codes
- Verify power and ground at the Vacuum Sensor B
- Replace the Vacuum Sensor B if the wiring and voltage tests pass
- Clear the code and retest
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Updated
Generic SAE J2012 definition. Last updated 2026-10-10.