lukascrystal77
Ioniq check engine light
Summary of the thread
A 2016 Hyundai Ioniq hybrid owner reported a check engine light issue, suspecting an air valve problem or a defective hose connection. Another Ioniq owner shared a similar experience, identifying a vacuum leak in the air intake system due to a cracked hose. The initial owner confirmed the issue was indeed a defective hose, which was repaired at a cost. The conversation highlights the importance of professional diagnosis to prevent potential engine damage.
Did this summary help you solve your problem?
4 comment(s)
lukascrystal77 (community.author)
No stalling, but the idle does seem a bit rough sometimes. Where exactly was the leak on yours? Was it easy to spot?
georgsmith7
Mine was a pain to find. It ended up being a cracked hose near the air pump – very small, almost invisible. Honestly, unless you have a smoke tester, you're probably better off having a workshop take a look. They'll be able to diagnose it properly and won't miss anything. It could be dangerous for the engine if it runs lean.
lukascrystal77 (community.author)
Thanks for the insight. I'll book it in. Turns out it was a defective hose, exactly like you said. Cost me 175€ to fix.
rmh_community_comment_box_header
community_crosslink_scanner_headline
community_crosslink_scanner_intro
community_crosslink_scanner_title
community_crosslink_scanner_price
community_crosslink_rmh_headline
community_crosslink_rmh_intro
community_crosslink_rmh_title
community_crosslink_rmh_subtitle
community_crosslink_rmh_brand
HYUNDAI
community_crosslink_rmh_model
IONIQ
georgsmith7
I also own an Ioniq, though I'm not sure what year. I had a similar issue with the check engine light. It turned out to be a vacuum leak somewhere in the air intake system. Did you notice any changes in engine performance, like rough idling or stalling? Might be worth checking the manifold pressure too.