After researching this fault code, I know even less than before. This is very frustrating because the code means different things on different brands and models of cars, and there are no definite diagnostic steps other than to check a lot of stuff. One article mentions a loose or leaking gas cap, an exhaust system leak ahead of the front oxygen sensor, "cylinder 4 contribution/balance", and "ignition coil 'A' primary or secondary fault", all for the same code. None of those are helpful or give us an idea of where to start looking. They do mention that this is not a serious fault code, but it is very common.
I'm going to get one of our other experts involved to see if they have run into this and have a better idea of how to diagnose this code.
Saturday, August 1st, 2020 AT 5:59 PM