Use an ELM327 bluetooth adapter on your chromebook
This application allows you to connect to the ECU in modern cars with a chromebook (Or computer running chrome) and a ELM327 adapter. For a chromebook the USB version of the ELM327 adapter is recommended (The bluetooth drivers are unavailable on the chromebooks I tested)
The app gives you access to a list of available sensors on your ECU and their values, a realtime view of values chosen by you with a history graph and the list of trouble codes (The check engine light). It also allows you to reset the check-engine light.