Hyundai Sonata P Codes (Powertrain) P0400 - P0499 P0421

Browse Hyundai Sonata P Codes (Powertrain) P0400 - P0499 P0421 questions and answers. Choose a question that matches your symptoms.

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Code P0421

2004 HYUNDAI SONATA
Trying To Find The Location Of Bank One Sensor 2 02 Sensor.
1 ANSWER
1 IMAGE
Asked by Dartanian Benson

I Have One Confirmed P0421 Code And One Pending Code...

2004 HYUNDAI SONATA
This Morning P0301 Code Pop Up In The Pending Code Category. I Have P0421 Code Which Is Related To Catalyst 1 Efficiency Below Threshold...
3 ANSWERS
1 IMAGE
Asked by vish4369

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