when the check engine light is on, stop the car and supply the parking brake,start the engine then plug the autoscanner to the 16-pin socket usually located under the instrument panel in the car.
trouble codes will be cleared automatically after trouble code display have repeated for 4 times,or they will remain in ecu if auto scanner is put out before 4 display. (or trouble codes will be cleared when press the "erase"during displaying the trouble codes,if successfully,it will display "clr " then display "uif"
reading trouble codes.read dtcs of powertrain system.
clearing trouble codes,after all dtcs of the powertrain system being displayed for 3 times,the autoscanner will clear the dtcs automatically.