heres my problem, The check engine light came on my E-150 van,then a few days later it went out(the bulb is not burned out) I have an emissions test coming up soon ,so i decided to plug in my code checker and it gives me a P1443 code.put the check engine light is NOT on????.should i erase the code? and have emissions test done?.The P1443 code reads-- Evaporative emission control system purge control valve circuit malfunction