Elantra Forum banner
1 - 8 of 8 Posts

·
Registered
Joined
·
3 Posts
Discussion Starter · #1 ·
Hello everyone, I've had my elantra coupe 2.0, 2017 for three years, bought in 2019, it has 71000 km and until two months ago it was working perfectly. In mid-June, while driving on the highway, it suddenly lost engine power, the engine light on the dashboard came on intermittently when I was accelerating, and I had clearly loss of power, as if the engine was in protection mode. The engine was also shaking when I was stopping at a red light or at the stop sign. I took it immediately to the hyundai garage, the mechanic called me back saying that they have no error code and do not know the problem. They drove the car two times and everything went well.... I get it back three weeks later, same thing. I bring it back again, no error code, the mechanic tells me I don't know, maybe an oil change. 2 weeks later, same problem. I can drive the car but the check engine light is intermittent. When you turn off the engine and restart it works again with no engine lights ( so impossible to get a error code with my diag). Clearly I don't want to go back to hyundai, they don't know anything about it, it's very dangerous to have this loss of power like that. I think it must be some sensor because it's intermittent ( air flow sensor or else)? any idea?
 

·
Registered
Joined
·
4 Posts
August 15th, exact same thing just happened to my 2017 Elantra. I only noticed loss of power when I got off the freeway and was sitting at the light. My engine was shaking also. I wasn't sure I would make it to the tennis courts. It seemed to me like it was a fouled plug. It wasn't idling the way it normally does and when I accellerated, it was sluggish. After a couple of hours of tennis, I opened the hood but couldn't find anything except a dirty engine. Got on the same freeway to go home, never got above 68mph, no engine light and running normally. Yeah, sounds like a faulty sensor or a fouled plug. I only have 23,400 miles on my car.
Any other news from your end Rich?
 

·
Registered
Joined
·
3 Posts
Discussion Starter · #4 ·
Hi everyone, after a month without the problem, it did it again this morning but this time I’ve used my diag device and it says code P0301 cylinder 1 misfire? Thanks for your advice on this
 

·
Registered
Joined
·
4 Posts
Mine was weird. The cylinder would not fire but I could get no engine light. When the engine light came on, after 6 or 7 times, I was able to hook it up to a thing at a parts store. Yeah P0301, cylinder three misfired. I was at Auto Zone, they told me 96 bucks for a new coil. I went home, bought 1 coil off of Amazon for 25 bucks. Took 2 minutes to put in. No more misfires!
 

·
Registered
Joined
·
3 Posts
Discussion Starter · #6 ·
Mine was weird. The cylinder would not fire but I could get no engine light. When the engine light came on, after 6 or 7 times, I was able to hook it up to a thing at a parts store. Yeah P0301, cylinder three misfired. I was at Auto Zone, they told me 96 bucks for a new coil. I went home, bought 1 coil off of Amazon for 25 bucks. Took 2 minutes to put in. No more misfires!
Very interesting I think I will do that then
 

·
Super Moderator
Joined
·
107 Posts
Yeah P0301, cylinder three misfired.
P0301 is cynlinder 1 misfire.



Before buying a coil you could move it to another cylinder to see if the issue follows. If it does then you know for sure. If it doesn't you could try moving the spark plug to a different cylinder.
Not all people like to troubleshoot before replacing parts and if the part is cheap, I get it.
 
1 - 8 of 8 Posts
Top