I'm starting this thread in an effort to put catalytic converter failure threads in one spot. I did a lot of searching and actually found what the issue with my son's car was before the techs did. I can't help but wonder if the new recall for a certain build of 2013 Velosters shouldn't be expanded. My car is not part of the recall for the ECM reflash. The service adviser said they hadn't heard of a catalytic converter failure issue with the Veloster (never been to a dealership where the service adviser had heard of an issue I had with a car... I must be lucky!) I'm not including threads from other sites but if someone would like to do so please add to! I'd like to create a one stop thread for people experiencing premature catalytic converter failure.
The car is a 2013 NAV with 39,000 miles, DCT and Tech package. It was bought used with 32,000 miles on it.
My son was driving his car recently when it just decided to shut down. He said he saw a puff of smoke, the gauge cluster lit up, and the tach went to zero. The car wouldn't start once it shut down. Never had a CEL come on since we've owned it. I got the car on a trailer, brought it back thinking something electrically had happened since the passenger side headlight would not turn off (weird). Checked the battery and it was low so charged the battery but unhooked to get the headlight to turn off. Once charged, reconnected battery terminals and the car fired right up. Charge voltage was 14.3 so no alternator issue. Car would idle fine but wouldn't rev up. Noticed a new sound in the engine that wasn't their prior to the engine shutting down. Brought the car to the dealer. I had the service writer start the car so they could see and hear what was going on. His first words when the engine started "that doesn't sound right". They spent the better part of the day diagnosing and found the catalytic converter had failed. Viewing from the bottom you couldn't see any issue but from the manifold side there was debris coming out. So at 39K miles the cat is fried.... very odd. The catalytic converter was replaced under the 80K emission warranty but I was told the engine sound diagnosis would be on my dime. I got Hyundai customer care involved and was told they would cover the cost to diagnose the engine noise. Dealer checked with their regional service rep who says "they can't do that" so I'm in a holding pattern right now while we figure out who is going to cover the diagnosis of the sound and the repair once they figure out something is wrong inside the engine.
My thought on the engine noise is that the cat suffered a catastrophic meltdown due to temps which caused a severe back pressure on the engine which caused some internal damage. The tech that worked on the car said that wouldn't happen to which I asked "then why would the noise appear after the meltdown?"... No good answer there.
https://www.veloster.org/forum/9-hyu...t-exhaust.html (2 with engine issues in this thread)
https://www.veloster.org/forum/9-hyu...converter.html (obviously engine issues here)
https://www.veloster.org/forum/37-hy...converter.html://www.veloster.org/forum/9-hyundai-veloster-engine-transmission/30945-engine-causing-catalytic-converter-throw-cel.html (I'm guessing the failed cat took out the original engine here as well as the second person at the end with similar issue)