Good evening guys (and gals)! I just finally bought my first diesel truck. True to my luck, I’ve had it less than a week and I’m already having problems. I’m really hoping I can get some great knowledge out of you all to ensure this truck lasts me for very many years to come. Now, let’s talk about my new project.... that wasn’t supposed to be a project. She’s a 2007 LBZ, EGR deleted and a single tow tune that adds around 70 hp. Allison tranny. Crew cab with a flatbed. When I got her, the only diagnostic code was P0673. On the way home (towing approx 5K lbs), we started having minor problems. (I’ll post this in somewhere more appropriate, as well.) I noticed her running a little cool. I dismissed it, and I still somewhat do because I figure it’s thermostat stuck open, no big deal. (To me, correct me if I’m wrong) I drove her a couple days to work and back to get a new windshield, tag, title etc. then the real fun started. I’ve now got P0128 Coolant temp low, P003A turbocharger boost control ‘a’ learning limit exceeded, P2563 turbocharger boost control sensor circuit range/performance. A few nights ago, I cranked it (60 degrees outside, no issue) and it was immediately not exactly right. I have very little power, engine sounds fine to me, but may not to someone with more experience. Seems to shift nice and smooth, but it’s hard to know with so little power. The dash lights were also fading in and out, like a failing alternator can cause. The previous owner did tell me that with the tune it will still throw turbo codes sometimes. There was no reduced power mode message on the cluster. I haven’t driven it since. Please help me, if you can. I’ll provide as much info as I can. I’m terrified that it might be a serious problem right after buying it.