Originally Posted by MotorvateDIY

It depends on the AFR gauge/controller being used.
For example, AEM's X-Series controllers have a 0-5 volt output that is proportional to AFR and they also have a CAN bus output of AFR.
(https://www.aemelectronics.com/produ...ntroller-gauge)

Tell me what gauge/controller do you have and I will look into it.

Also, I have verified that boost levels can also be read using OBD Service $01 (live data)


Thanks for the excellent questions and keep them comng