[btatbui2017]

We were getting these P030X codes on all six cylinders many times for years. We clear the code with our OBD II scanner and those codes would come back every so often especially when the weather gets colder. I think (not 100% sure) what eventually fixed the problem for us was that we were getting codes to replace the front set and then a year later to replace the back set of O2 sensors. After all of those sensors were replaced, those P030X codes any longer comes up. However, now we get the P0420 to replace the catalyst:-(. We had the VCM tuner 8 months before the O2 sensors and it did not help. Although, it will help with the engine mounts and other issues going forward unfortunately too late for the first replaced set of engine mounts for us. Is there any connection between the exhaust and the P030X code?

By the way, we replaced one coil (Intermotor Coil on Plug Coil from Advance Auto) back in January 2015 (58K miles ago) and it still works well.

We have had very good luck with 3rd party parts from Advance Auto, which our mechanic strongly suggest not to get. Another is a Remanufactured Carquest starter that is going strong after 5 years+. Although, certain parts like engine mounts, CV axle, etc., we would always try to get OEM unless we cannot justify it.