P1100 Barometric Pressure Sensor Circuit Malfunction
What does P1100 mean on a Toyota?
P1100 — Barometric Pressure Sensor Circuit Malfunction. This Toyota-enhanced code applies to Camry, Corolla, RAV4, Tacoma with BARO sensing.
Common causes of P1100
- Failed barometric pressure sensor
- Open or shorted BARO circuit
- Corroded BARO connector
- Blocked sensor vent port
- ECM reference fault
How to fix P1100
- Compare BARO readings to local altitude pressure
- Inspect the sensor vent for blockage
- Test circuit continuity and shorts
- Check the connector for corrosion
- Replace the sensor after circuit confirmation