cat's are my problem and its unusual

[huasi87]

Hi there, well my story starts when the mil lamp show on my dash of the 06 300C 5.7L. got the codes pulled from the car it was codes for left cat sensor. went to the dealer and they said that I need to replace them each costs around 900$ WTF!!!!. got my car back without fix 2 weeks of use and then I tried to start it it starts then Immediately shuts off. called a friend at the dealership and came with the handy PC check ECU for codes and said that ECU finds huge pressure on one side of exhaust so it stops the engine. I got those cat's opened and removed the filter from them and the car became drivable again with the mil lamp. now here is they funny part whenever I pull the codes for my car it only shows this P2098 which is one of the cat's low efficiency but it dosent show the other one which is P2096 eventhough that I had both of them filter removed. So is there is any chance that I have one O2 sensor Damage and if I replace it mil lamp will go away?????? any help or Ideas!!!!

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[huasi87]

Originally Posted by huasi87

went to the dealer and they said that I need to replace them each costs around 900$ WTF!!!!.

I mean that the whole cat should be replaced cause it is broken from inside