So I deleted my truck couple weeks ago (2015 3500 DRW) since then I’ve had the wif light on. Changed filters....still on. So drained the tank changed filters again and wif both sensors....light still on. Now I get a dtc code on MM3. P238D no description found! I’ve check all the wiring up under truck to make sure I didn’t cut any wires. Can’t come up with anything. Anyone have any ideas? Or had same problem?