Monday, February 3, 2014

P0301, P0302, P0303, P0304, P0305 and P0306 on you Jaguar X-type

Most likely problem: Ignition Coil for the respective cylinder (look at the map)

This codes are flagged by the computer when it sees that one or more cylinders are misfiring. Each code belongs to its respective cylinder (denoted by the last number on the code). Here is a map:
For example, if you have a P0304 then you would have a misfire on cylinder number four in the picture. Each cylinder has its own respective coil and spark plug. Some are easier to access than others. So, where to start? First, if you haven't changed any coils before, change the coil for the respective cylinder and the spark plug. 99% of the time is the coil going out. But here is the catch: if today you have a misfire in cylinder, let's say two, and you change the coil and that fixes the problem, you need to understand that the other five are coming, real soon. So you might want to save time and change all six coils and spark plugs. If that doesn't fix the problem, in my experience very unlikely, then you might want to look at the following:

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