Buick Repair Questions? Ask a Mechanic for Answers ASAP
good morning my name is ***** ***** I will assist
the first thing is to identify the code so we can narrow down the area of failure. a parts store can get you the code for free. once that is determined, let me know that code and we can proceed. guessing is not an option as there is over 1500 possible codes.
how are you making out
ok, I will be here until 9 tonight
ok. the 420 is a catalytic converter efficiency code. the converter cannot do its job anymore and needs to be replaced. be careful on what brand you get. the cheap ones will not last. you will need one that has a 5 year 50k warranty for the light to stay out.