The VSC light is related to stability control. Chances are one of the wheel speed sensors is bad. I don't feel it is related to the P0430.
Now, the 430 can be the converter (most times it is), or it can be the oxygen sensor (air/fuel sensor).
I need to know if you have a live data scan tool. If you do, we can check to see how the A/F sensor is reacting. That could cause the idle issue and also be causing the code. Also, the short-term fuel trims, which can be seen via a live data scan tool, can help determine if the mixture is wrong and the computer it trying to compensate.
As far as the VSC, we have two options. First, have the can-bus system scanned to determine if there is a code related to the VSC or a wheel speed sensor. CAN stands for controller area network. Basically, all modules/computers are tied together via a few wires. This type of scan should identify stored codes in any of the modules. Here is a link that shows how it's done:
Next, if you can't have that done, you can check each wheel speed sensor using a multimeter or voltmeter. Here is a link that shows how to do it:
Let me know what is found or if you have other questions. I realize this may seem complicated, so please feel free to ask.
Thursday, May 6th, 2021 AT 9:05 PM