Hi, I have an 07 RX350 with approx 92k km's. out of the blue the CEL and VSC light came on. Did the gas cap thing and this solved the problem for a little while but they came back on. Vehicle was running rough and I checked the coded and p300 and p356 came up. This morning I was all set to take it in, but now the lights are off again and its running fine. I'm going to see what happens over the next little while but wondering if anyone has had a similar experience or can offer any suggestions. Thanks Rob