Turbocharger Pressure Too Low

1. Clogged air filter. Replace air filter element.
2. Leaks between cylinder head and turbocharger or between cylinder head and turbine. Tighten loose connections and/or replace broken gaskets and seals.
3. Exhaust system partly clogged. Clean or, if necessary, replace exhaust system.
4. Pressure regulator incorrectly adjusted. Replace turbocharger.
5. Turbocharger shaft seizes. Replace turbocharger.