See also:

If the light illuminates steadily
If the light illuminates steadily while driving or does not turn off after the engine starts, an emission control system malfunction has been detected. You should have your vehicle checked by ...

Other bulbs
It may be difficult to replace the bulbs. Have the bulbs replaced by your SUBARU dealer if necessary. ...

Before checking or servicing in the engine compartment
- Always stop the engine and set the parking brake firmly to prevent the vehicle from moving. - Always let the engine cool down. Engine parts become very hot when the engine is running and ...