2011 Buick Regal Q&A
2011 Buick Regal Question: what does these 2 code definitions mean?
You gotta check out the o2 sensor output + wiring etc on bank 1 Google it of utube tell you how to go about it.. - asksteevies
check with the dealer could be still under warranty - goodguy
warranty on emissions is 7yr 70k miles - globalhelper