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Hyundai Master
2,426 Answers
- Posted on Nov 23, 2016
Re: 2003 hyundai santa fe po401
P0401 means Insufficient Exhaust Gas Recirculation (EGR) Flow. The computer has detected that something is wrong with the EGR system. Can be caused by the EGR tube being blocked/restricted, bad EGR valve, EGR valve not opening (no vacuum), or a bad sensor.
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