Car dies while driving. What should I replace next? - Hyundai Elantra Forum
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post #1 of 2 (permalink) Old 03-18-2019, 07:52 PM Thread Starter
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Car dies while driving. What should I replace next?

We've been having some problems with my wife's car and I can't seem to get a solid answer on where I should go next.

The Car:
2013 Hyundia Elantra GLS
1.8L I4 DOHC
Auto Trans (6-speed?)

The Problem:
The car started randomly dying at lower speeds (usually less than 15 mph) about 2 weeks ago. It usually always happens when she is coming back from somewhere so the car is up to running temp. When the car dies, it just turns off; no sputtering, jerking, or power loss. Also, when the car dies, all the lights come on on the instrument panel. The car can be started immediately but usually dies 2-3 more times before it stays running. This happens 3 out of the 4 trips we take with this car per week. The car idles fine around 1000 RPMs and doesn't seem to run rough.

Today the car also started dying when shifting into reverse. When doing so, the 'R' will dissapear on the instrument panel. I've tried shifting from P > R and N > R. I've also tried to let the car roll backwards before attempting to shift it. The car turns off every time.

Things I've done:
1) Replaced the alternator I first thought it was something to do with the engine losing power but this didn't fix the issue.
2) Checked ignition coils All contacts were clean
3) Checked the ground connection Retightened the battery connection and cleaned the contact in the engine bay with a wire brush.

I read that the problem could be either
1) Throttle Position Sensor
2) Crankshaft Position Sensor
3) Camshaft Position Sensor
4) Something with the Ignition (my wife has a lot of keychains but I don't think that has worn it out enough for this to be the problem)

Does anyone else have suggestions on what I should try replacing next?
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post #2 of 2 (permalink) Old 04-04-2019, 05:28 PM Thread Starter
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Just wanted to update this thread.

We ended up taking the car to the dealership for a full diagnostic test to figure out the issue. When I pulled up to the dealership, I demonstrated to the tech what exactly was going on and showed him that the car died as soon as I shifted into reverse. Apparently, the dealership was not able to replicate the problem after that....(Maybe I'm cursed?) According to the Hyundai recall website, the car had only one thing that needed replacing (some brake stop pad). However, the car actually had several recalls that needed to be done which included updating the ECU as well as replacing some shift cable and clip. We paid nothing for it and the car has been fine ever since.

If anything looking at this is having the same problem, I would suggest contacting the dealer to see if there's any hidden recalls that your car needs.
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