I am reaching out here for some advice. I live in Ca and have to smog my truck. The EGR monitor will not reset. I know it had a previous tune and I know it has been tuned back to stock. I am wondering if the tuner screwed up the monitor reset? I installed a new EGR valve, ran the truck for 1500 miles, tried the drive cycle patterns, etc. I am totally at a loss. I would really appreciate any thoughts or advice on this. Thank you!