check engine code 10-5

hi guys a reset my check engine today...and the engine light doesnt appear again..nice, but i used the decoder of the sings and tell me that the 10 - 5 means. EGRC Solenoid valve......and i no have any idea what is that??? any suggestion????????

i have no idea.. but when my car wouldn't start they told me that one of the possibilties was the solenoid..but it iturned out to be the starter. But my code was 5 - 5...