For 1990-2009 cars

#### Special Tools

EN 46091 Inner Cooler Tester

Cause | Correction
--- | ---
Air inlet leaks or obstructions | Inspect for leaks or obstructions in the turbocharger inlet pipes/hoses.
Leaking charge air cooler/pipes/hoses | Inspect for leaks or obstructions in the charge air cooler/pipes/hoses using EN 46091 tester .
Leaking or restricted exhaust system |

1. Inspect for a leak in the exhaust system.
2. Inspect for a restricted exhaust system.

Intake system leaks or obstructions |

1. With the engine off, pressurize the intake system using EN 46091 tester and inspect for intake manifold leaks.
2. Inspect for obstructions in the intake manifolds.