I haven't used my 97 J30 much over the last 3 months. My battery was dead. My boyfriend tried to jump-start my car with his Hyuandi hybrid. He had to look for his battery because he didn't know where it was at first??? It was in his trunk. (I guess it's because of it being a hybrid)
Anyway, he told me to try and start my car. It started to turn over but didn't quite make it. He said the jumper cables were getting really hot. He said something about maybe having cables reversed. He reconnected the cables again. The same thing happened except this time, the engine kept trying to turn over even after I took my key out of the ignition! He ended up taking the battery out and putting it on a charger. The next day, he put the battery back in and it started. HOWEVER, it made a weird new sound, and my check engine light came on for the first time since I've owned this car
I went to AutoZone to test it and it showed two codes. PO100 Mass or Volume Air Flow Circuit and PO325 Knock Sensor 1 Circuit Bank 1.
I have had my car jumped before and never had any problem starting it on first try and never heard that noise and never had the check engine light come on afterward.
I'm looking for advice on what you think happened to cause the jumper cables to overheat, why my car kept trying to turn over even after the ignition was turned off and my key was out, and why this caused my check engine light to come on and the two codes show up when tested. When I asked him if having the cables reversed could have caused this, he got mad and says they weren't reversed (which was news to me). I asked him why the cables got overheated and he didn't have an answer for that. Hey, I make mistakes. Everyone does. I wouldn't have been upset that he accidentally hooked them up wrong. I am upset that he seems to be lying about it though.
Thanks in advance.