A8 · Advanced
P0420 After a Parts-Store Fix
2016 Hyundai Sonata · 2.4L I4 (Theta II) · 6-speed automatic · FWD · 103,500 mi
Customer interview
Tyrell Ford · Frustrated, already spent money
Light came back on. Another shop put in two oxygen sensors and it lasted about a week. I need this to pass inspection.
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