Forced Induction

Turbochargers and superchargers with their wastegates, bypass valves, boost control solenoids, intercoolers and charge pipework. The single most common fault in this system is a leak somewhere along a long, hot, pressurised path — not a failed turbocharger.

256 codes · 10 components

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Components

Trouble codes

Critical 1

P0049 Turbocharger/Supercharger A Turbine Overspeed Stop driving

High 54

Moderate 42

Information, not instruction

CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.

Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.

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What makes one worth reading:

The car — make, model, year and engine. The same fault behaves differently on each.
What you measured, not only what you replaced.
What actually fixed it — or that nothing did, which is worth knowing too.