I posted a few months back at around 3k miles when I had my “check engine” light turn on while accelerating on the highway. Turned out to be a cracked spark plug which was replaced and resolved the issue at the time. Cut to 3k miles later (2018 stinger gt v6 @6.5k miles) A few weeks ago, I started noticing a sputter and/or jerking when accelerating, but hesitated on bringing my car in since it was an over scheduled week already and I didn’t have the time. Well, the shop visit was forced upon me when the “check engine” light came on. I immediately bring my car to the shop and leave it for the night. A day later they called me to tell me the car was ready for pickup. “Was anything wrong?” I asked. The service rep said no, it was only some sort of legacy code that was popping up from the previous repair. Well I didn’t think to question him and drove home without issue. One day later (today), I’m accelerating on the highway and I’m greeted by another solid yellow “check engine” light. The dealership/shop is closed since it’s Sunday. This is started to become a nightmare of inconvenience, but I’m trying to be proactive. What questions should I ask them tomorrow? Is there anything I should insist they do or inspect?