Cavalier ? also in PCM Diagnostic
now her check engine light has come on and i was wondering if this hasta do with the Air Filter or if it hasta do wiht her oil...her brother just changed the oil and am not sure if he rest the PCM or whatever or not?
if it is the air filter....would jsut replacing it and riding around wiht it take care of this light or not? if so GREAT....if not what will need to be done or what can be rong?
what should i do?


