One problem related to manifold/header/muffler/tail pipe has been reported for the 2008 Honda Odyssey. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2008 Honda Odyssey based on all problems reported for the 2008 Odyssey.
I never had any major problems with my van up until this point. The check engine light would come on and go off from time to time and I took it in for a diagnostic check each time and it was the same code for catalytic converter. My car ran well and then suddenly, while taking my kids to school on a city street, the muffler began smoking when I would either idle or drive. It only did this the night before I brought it into the shop and the day of. It would hesitate also. I felt like it was going to die at any minute, so I took my kids to school and brought it to the shop immediately. The mechanic then told me I did not have a drop of oil. This seemed strange because I had never seen a leak (I park in the same place at my house). He tested my car for a leak and did not detect any. Some people suggested that the oil change place forgot to put oil in my car. That is highly unlikely since I had just gone to have my oil topped off about a month before. I had also driven it for about 2500 miles since then. Because of the lack of warning, I have to replace my engine. . . It is shot.