About the mass airflow sensor. Mass airflow sensor. Throttle position sensor. Lv_trd_l2_c4_as13 electronic ignition. The hall effect is a square waveform is square. Isc. Isc. Optical pickup System. Inductive sensor system. Distributorless ignition system. Distributorless ignition system. Air Flow Meter. Air Flow Meter. Relay. Egr valve. Fuel Injector.