So I did all this work on main this week and the only thing didn't change from before is the smell. Main is a diesel and I get the smoke smell inside the cabin and The shop told me I'm getting smell inside my cabin because of the egr cooler Leake but I replaced with a new one and I'm still getting a bit smell. I have no clue where that's coming from. I also changed the thermostat once the egr cooler being replaced. Now my worries are how do I get the codes off. I was expecting to go off automatically but I don't know if that's possible. Can someone tell me what else is the parts i can check to change the smell.