2002 Honda Accord DX

2002 Honda accord base model Kelly blue book is 3400 fresh oil change newer tires and battery brand new taillights drives really good the thermostat reads sometimes and sometimes doesn’t I replaced it but didn’t solve that has a dent on the passenger side door but doesn’t affect it check engine light on for catalytic converter low power but I didn’t wanna spend money on that cause I don’t have smog clean title