2006 1500 Hemi 4x4, 127k mi. Check engine light cycles, on about half the time. Code read-out indicated a problem with right bank cylinder elimination system, must be the MDS system. Mileage dropped about 4-5mpg with this code, leading me to believe that it is no longer turning off four of the cylinders on the highway.

Replace sending unit? If so where is it? Are there mulitiple sending units for the MDS? One of them failed right after I bought the truck, and it started dumping oil on the exhaust system. The dealership fixed it that time, but I'm afraid this one is my problem.

Any help will be appreciated.

Ram-beau