2003 Kia Sedona Q&A

2003 Kia Sedona Question: Not sure if I need a new Cat converter or is it just an O2 sensor?

Engine light started to go on after I hosed off the engine. Light blinks on and off. Not having any signs of a bad converter as discribed on the web. Dealer wants to jump right in and change converter, shouldnt we troubleshoot with new sensors first. Autozone ck'd w/ diagnostic, most likely Faulty HO2S, rich air/fuel ratio, lastly was faulty converter -
Answer 1
have live data read and watch 02 wave forms to determine if o2 is good b4 repl any parts. if unable seek help from mech as not to waste money -