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Discussion Starter · #1 ·
I have a 2013 Accent GLS with 99K miles. Since the day I bought it (used), it's had a slightly rough idle - especially when the A/C is on. When I go up steep or long hills, I get a check engine light with a "knock sensor" code. I've had the knock sensor code about six or seven times in the past three years that goes off within a day or two.

Also, the A/C light flickers when the car's idling.
Recently, it's been burning a lot of oil and the exhaust area sounds like it's puttering a bit loud.

Three days ago, I took it in for an oil change, A/C recharge, and spark plug change.
I was able to drive in town about 40 miles and then I had a flashing check engine light come on.

Any ideas or has anyone experienced similar issues and can say what the problem/resolution was for their car?

This is my first Hyundai and possibly my last, too.
 

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Discussion Starter · #3 ·
Ignition Coil #2

Fried ignition coil #2 was the culprit.

I just need the car to run for at least another six months. Do you recommend a fuel system cleaning or timing belt change at 99K miles? Any aftermarket recommended brands for ignition coils?

My car is getting fixed at an an independent shop. They said they get parts from O'Reillys.

Also, how do I go about getting PCM update?

Thanks!
 

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Discussion Starter · #5 ·
I don't know the error code because it's at the mechanic.
But he said ignition coil 2 is bad, which I agree with.

I had the shop refill the A/C because of the flickering A/C light. I assumed the refrigerant was empty. Now I know all the problems I'm having are likely related to this common ignition coil problem.

Again, anyone have recommendations/experience with aftermarket ignition coils?
At what point should I clean the fuel system?
 
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