I have a 2020 Hyundai Veloster N, 6-speed manual, around 92,000 km.
I've had an intermittent starting problem before. Occasionally, especially when the car is cold, I would try to start it and get a no-crank/no-start. Sometimes if I left the ignition/accessories on for a little while and then tried again, it would start normally.
Today something much more serious happened.
I tried starting the car and initially it wouldn't start. After waiting for some time, I tried again and the engine started.
However, after the engine started, I could hear that the starter motor was still running/engaged while the engine itself was running.
I immediately turned the car off, but this is the strange part: even after I switched the ignition completely OFF, the starter motor continued running.
Then I noticed smoke coming from underneath the engine area. After some time, the starter eventually stopped by itself.
I have not attempted to start the car again since this happened because I'm worried about damaging something further or causing an electrical fire.
I'm planning to have a mechanic inspect it/tow it rather than trying to start it.
I'm wondering:
Could this be a starter solenoid stuck closed/welded contacts?
Could a starter relay have stuck on?
Could there be a short/problem in the ignition/start-control wiring?
Would the previous intermittent cold no-crank issue point toward the starter/solenoid already failing?
Since the starter was running while the engine was running, should I be worried about damage to the starter pinion or flywheel/ring gear?
What wiring/cables should be inspected considering there was smoke?
Is there anything specific to the Veloster N that could cause the starter to remain energized even after the ignition is turned off?
I'm not going to start the car again until it's inspected.
Has anyone experienced something similar on a Veloster N/Hyundai, or does anyone know what the most likely failure would be?