Having problems with your Hyundai Santa Fe ?
Replaced egr valve. still getting p0401 code. engine is idling rough. thoughts
Is there a steel tube that runs up to the valve cover? If so check to see that it isn't blocked. If it blocks up it will give you a code that the EGR isn't working and mess up the idle.
Repair Help & Product Troubleshooting for Hyundai Santa Fe
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