2003 MDX. I decided it would be a good idea to drive fast through a big puddle in the back of a parking lot. I am sure the exhaust didn't go under. That was a few days ago and the emissions and VTM4 dash lights are turning on. I reset the codes and they still come back on. The vehicle drives fine. I don't know if I need to dry out a wiring harness or just let it dry in general for a few more days.... I will go get the codes read tomorrow. Any idea where to start looking?