P0049
MODERATETurbo/Super Charger Turbine Overspeed
What this code means
Turbo/Super Charger Turbine Overspeed. This family covers the measurement of incoming air and injected fuel, together with the emission devices attached to them. A fault here distorts the mixture the engine burns, which costs fuel and raises emissions.
How to read this code
- PPowertrain
- 0standardised code
- 0Fuel and air metering, auxiliary emission controls
- 49P0049
The letter P names the system: Powertrain. The digit 0 that follows marks a standardised code, shared by all manufacturers code. The next digit, 0, locates the fault: fuel and air metering, auxiliary emission controls.
What to do
Have it checked this week. The car remains usable, but the fault will not clear itself and will fail the roadworthiness test.
Clearing a code switches the light off but repairs nothing: if the fault remains, the code comes back.
Nearby codes
- P0040O2 Sensor Signals Swapped Bank 1 Sensor 1/ Bank 2 Sensor 1
- P0041O2 Sensor Signals Swapped Bank 1 Sensor 2/ Bank 2 Sensor 2
- P0042HO2S Heater Control Circuit (Bank 1 Sensor 3)
- P0043HO2S Heater Control Circuit Low (Bank 1 Sensor 3)
- P0044HO2S Heater Control Circuit High (Bank 1 Sensor 3)
- P0045Turbo/Super Charger Boost Control Solenoid Circuit/Open
- P0046Turbo/Super Charger Boost Control Solenoid Circuit Range/Performance
- P0047Turbo/Super Charger Boost Control Solenoid Circuit Low