1999 Toyota Corolla CHECK ENGINE LIGHTS ILLUMINATED

MY CHECK ENGINE LIGHT ILLUMINATED THE SHOP SAID THAT THE PROBLEM WAS THE CHARCOAL CANISTER EVAPORATIVE SOLENOID PAID $325 DOLLARS TO GET IT REPLACED AND AFTER ONLY 3 DAYS THE ENGINE LIGHT ILLUMINATE AGAIN. CAN YOU TELL ME WHAT ELSE COULD CAUSE MY CHECK ENGINE LIGHT TO ILLUMINATE BEFORE I BRING THE CAR BACK TO THE REPAIR.


THANK YOU VERY MUCH