VSC and Check Engine Lights + C1201 Code

Now days just about any code will make all three light turn on...need to start with the first code that comes up.

NOW SAY NEEDS ECM ??????? Why ????? Your best bet , take it to a qualified repair shop .
https://www.autocodes.com/p0500_toyota.html

Po031 bank 1 sensor 1 O2 sensor,front catalytic.

Check engine light, VSC TRAC & TRAC OFF lights - Toyota ...

www.toyota-4runner.org/.../4164-check-engine-light-vsc-trac-trac-off-li...
Jun 6, 2004 - I just bought it, and a few days later the check engine light, VSC TRAC, and TRAC OFF lights all came on. I took it to a dealership and was told ...

VSC and TRAC OFF lights came on? - Scion xB Forum

that code 356 is a bad coil. if it is completely dead than you now have a 5 cylinder car.... very bad not only on mpg but also on the life of the engine. when you have a "dead hole" it can affect the other cylinders and you have misfire codes for all 6..... this could mean you simply need a tune up or that there is something affecting all cylinders. check for a vacuum leak after the air flow sensor, or a ruptured fuel pressure regulator (remove the vacuum line at the regulator and smell for gas cause there should not be gas on that side of the diaphragm) fouled spark plugs, clogged exhaust or catalytic converter, stuck open or dirty EGR valve to name a few. change that #6 coil first and at least inspect or change the spark plugs... c1201 relates to a communication stop between ECU's , don't assume that as the vsc lights etc were illuminated then that is the system that is faulty. It is most likely that the fault is within the engine system but with vehicles equipped with vsc all systems are linked so a fault with one will log a code in all others ( normally a communication stop code as you have)
I would advise fixing the engine codes first then get the other systems checked out

Whenever engine fault codes set, VSC is disabled and lights come on. P0020 shows failing cam shaft position sensor , recommend replace clear codes and recheck. gas spill was coincidental.

hello, this code usually comes up in conjunction with another code, it just means that another computer on the car can not communicate with the ECM, are there any other codes besides this, is the abs/VSC, TRac cruise control or 4x4 lights on?

Battery was diconnected for 1 minute and then reconnected. All lights are off.

Your vehicle’s computer system has self-testing capability. When the computer senses that there is a problem with some of the components it stores the correspondent trouble code(s) in its memory and lights up the Check Engine, Service Engine Soon, ABS, VSC Or TC lights to tell you that there is a problem and you should have the car diagnosed and repaired. When there is a problem with the engine control system, any other systems that communicate with the engine control module (ECM) may turn on their indicator lights at the same time because a code has been stored in the ECM. I would take it to a service center you trust and let then come up with a solution. Sometimes a problem in one system will turn light on for other systems that communicate with it, but it doesn't mean there is a problem in those systems.

Please let me know if this information is helpful. Positive feedback is appreciated. Thank You!