P1406 Turbo Pressure Sensor Range/Performance (Diesel)
What does P1406 mean on a Toyota?
P1406 — Turbo Pressure Sensor Range/Performance (Diesel). This Toyota-enhanced code applies to Hilux, Land Cruiser Prado D-4D.
Common causes of P1406
- Drifting turbo pressure sensor
- Boost leak skewing readings
- Sticking turbo vanes
- Soot contamination
- Failing sensor
How to fix P1406
- Pressure-test the boost tract first
- Compare sensor readings to a gauge
- Check turbo vane movement
- Clean the sensor port
- Replace the sensor if readings drift