Throttle body: Device that regulates the air intake into the engine. It is mainly controlled by the accelerator.
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It is made up of a butterfly check valve that regulates the air passage to the engine. It can be mechanically activated through the accelerator pedal, or electrically through a servomotor according to certain variables calculated by the ECU. It should be cleaned regularly.
My airbag light came on as a result of the lumbar support cushion in driver's seat blowing. Had to have airbag fixed. Light was on as the result of a wire breaking in the seat system. Had to take it to the dealership to be seen by an airbag specialist.