How do I turn off a check engine light on a 99 Buick Century?

My car is really sensitive when it gets on a computer at a auto shop. I already got my car scanned for codes last year and it came back a Tranny problem. My check engine light was off until now. How do I turn it off myself?How do I turn off a check engine light on a 99 Buick Century?Buy an OBDII code reader and reset it.



You can also disconnect the battery for about 30 minutes. If your radio has a theft protection code, make sure you have it before doing this.



You can also go to Autozone or Advance and have them scan it for free and reset it. There may be something wrong that needs to be dealt with. That's why it is there.How do I turn off a check engine light on a 99 Buick Century?disconnect the positive battery terminal, turn key on, wait 15 seconds, turn key off, hook terminal back onto battery