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I've have a 2019 Elantra N-Line I bought new. A few months ago the check engine light came on. I contacted the dealer and scheduled an appointment. In the interim I had a parts store run a diagnostic which came up as all four cylinders misfiring.
The light turned off but I still went to the dealer who found no problems. It came on again and this time ran really rough. The dealer cleaned the valves and it was good again. The light came on again and at the advice of their headquarters the dealer changed the valves. Its on again.
Has anyone else had this problem? I'm curious if it could be something to do with the higher amount of ethanol in the fuel lately.
The light turned off but I still went to the dealer who found no problems. It came on again and this time ran really rough. The dealer cleaned the valves and it was good again. The light came on again and at the advice of their headquarters the dealer changed the valves. Its on again.
Has anyone else had this problem? I'm curious if it could be something to do with the higher amount of ethanol in the fuel lately.