What genius suggested the purge valve, Farcebnook I am guessing.? The way to check it is is to try to blow through it engine off, it is supposed to be normally closed.
The TPMS could only be to blame if 1 or of the tires was low and you didn't notice, it has no connection to the EBCM. You said they were all 35PSI. The battery life in the sensors is about 10 years.

 

The 'genius' who suggested the purge valve is a guy on YouTube who was working on a Vauxhall Corsa, which is a GM derivative in the UK.
With regard to the TPMS sensors, I believe you are correct as they have never been changed in my 9 years of ownership.
At this point, I'm debating whether to buy a SAS scanner off Amazon to recalibrate the sensor (assuming that's the issue) or being forced to seek professional help, UGH!

 

You need new sensors. There's no recalibrating, the batteries are dead.

 

There is absolutely no way the purge valve could be involved with your stated symptoms

 

I was talking about recalibrating the Steering Wheel Adjustment Sensor, nothing to do with TPMS.

 

To avoid confusion: "Steering Angle Sensor". Unless, you are talking about something other than C0460-42; the top of the list for that is mis-matched tires or the steering wheel has been "adjusted" wrong.
Not a matter of calibration; it is a SIGNAL problem. Not calibrated would be C460-4B. There are 10 variations of the C0460 code

From Mitchell OnDemand

 

I didn’t have to recalibrate the SAS , just had the turn the steering wheel then cycle the ignition switch.

 

This.^^^

Another nonsensical claim that keeps showing up on FB is that you fix an ESC light by replacing VVT solenoid valves.

The only explanation I can imagine for such goofiness is that some fool confused wheel speed sensors with the requently misnamed "sensors" that are really VVT solenoid valves.

 

Bad VVT valves can cause the ESC to turn off, just as some other "performance" codes can. If the engine is not running well there is no need for ESC, the car should be parked. Not always the first on the list. Not usually if combined with the ABS warning, that would be wheel speed sensors. This case is different, it has a different code.

 

Huh. Why? I don't totally understand how ESC works. Can it make demands on the engine that a poorly performing one can't meet?

In any event, it would seem that if a VVT solenoid problem was behind an ESC light, there would be a VVT solenoid code. Same for any other "performance" issue. Anything else would be a bug, not a feature.