This sounds like an intermittent electrical communication issue. This is called a CAN bus network and the way it works is like a highway where the modules communicate back and forth with each other. When there is an issue on this, there are odd and seemly crazy things that happen because these modules are not able to communicate with each out.
Here is a guide that will help with this:
https://www.2carpros.com/articles/can-scan-controller-area-network-easy
However, the fact that you shut the key off and all returned to normal is what tells us that this was a temporary condition. I am not suggesting it will not happen again but there is no guarantee that it will happen again.
What I would suggest is checking for codes now and if there are none then we are going to have to wait until this acts up again or is more predicable.
https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing
The cause of this is a module that is communicating a the wrong time or is not able to communicate due to a wiring issue and these types of issues occur. The reason they do is because it is like the highway is full of traffic and the one module cannot get its message to the other module so they act crazy.
Shutting it off and starting it back up clears it up because it resets the module.
Let me know what questions you have. Thanks
Dec 11, 2020 at 9:42 AM
