[HumminNBoatin']

When my cats went I did not get that code. But mine did go out at almost the same mileage you have now. Typically when cats are going out you get O2 sensor codes. However if those guys had that code when cats went I would check there first. Then go pulling spark plugs and check if your cats are clear. If it is truly ignition i would replace plugs and cam/crank sensor.