Code Definition

P0049 — Turbo/Super Charger Turbine Overspeed

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P0049

P0049 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P0049 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The P0049 code indicates that the turbocharger or supercharger turbine is rotating at a speed higher than the maximum allowable limit. This condition is monitored by the Engine Control Module (ECM), which sets this code when it detects the turbine speed exceeding the specified threshold. Turbine overspeed can occur due to excessive boost pressure and poses a risk of damage to the turbocharger or supercharger, along with potential negative impacts on engine performance and durability.

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