Hi, Ive read your description and i have done similar project in my portfolio, I am a mechatronics engineer expert in embedded systems and have strong working experience with arduino. I have done a similar project of agricultural vehicle health monitoring system where we use the lamba(oxygen) sensor to detect how lean the fuel mixture was and to detect the incomplete burning of fuel we did the project on arduino.
My experience with automotive systems will be of help for you and i can guide you in the right direction.