P1511 Boost Pressure Low (Diesel)
What does P1511 mean on a Toyota?
P1511. Boost Pressure Low (Diesel). This Toyota-enhanced code applies to Hilux, Land Cruiser Prado D-4D.
Common causes of P1511
- Boost leak in intercooler pipes
- Sticking turbo vanes
- Clogged air filter
- Exhaust leak ahead of the turbo
- Wastegate stuck open
How to fix P1511
- Pressure-test the boost tract
- Inspect intercooler boots
- Check air filter restriction
- Examine exhaust manifolds for leaks
- Service the turbo per findings
Sources and review
- Last updated 2026-09-06.