I am having problems wit misfiring and dont know what the codes mean

65

Asked by Mar 23, 2015 at 02:41 PM about the 2002 Jaguar X-TYPE 3.0

Question type: Maintenance & Repair

I bought the car last spring and didnt have any trouble until cold weather then it started misfiring and my mpg went down drastically the codes I have are P0304 P1314 P1316 P0420 there is so many things can you help me narrow it down to just a few things I can check before I have to spend alot at the dealership

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65

Also had these codes P1111 P1145 P1155 P1175 P0304 P1314 P1316 P0420 Please can you tell me what I need to do so I can fix the problem with the car.

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