Expert: Don Berlan - 9/21/2010

Question
check engine led to replacing right bank cat conv and both oxygen sensors with OEM ($2100). 2months, check engine said same thing, changed cat conv again.  Check engine light again says same cat is bad.  I've heard computer has to be reprogramed after this repair to reset sensors?? Ideas?

Answer
Have you been replacing cat with OEM or aftermarket cat.Reprogramming doesn't reprogram the sensors and I don't think that this is your problem,although it says right cat is the left working properly as well as the sensors.It all is related to each side.Make sue the sensors on both banks are working right and the other issues that could cause your problems like plugs,fuel pressure,oil leaks.