Hyundai Sonata P Codes (Powertrain) P0400 - P0499 P0401

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2003 Hyundai Sonata PO401 Check Engine Code

2003 HYUNDAI SONATA
After Researching Many Articals On This Trouble Code (po401) Egr Insuffient Flow I Was First Lead To Believe A Bad Egr Valve Or Actuator...
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Asked by toodog733

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