I would love to compile a chart/spreadsheet that has OBD2 live data figures, the normal range for those figures, and if outside of the normal range, the most common problem. Is there already a chart around that anyone knows of? I have not been able to find one. I want something like this so I can periodically look at live data to assess the overall health of the vehicle and fix things before they become a problem. My goal is to have all of this info easily accessible so I do not have to do hours or research and pour over forums.
In addition, what data would have a range that is specific to make/model/engine, etc.? What data typically has a "generic" range?
I feel like if I had a chart like this combined with any error codes that come up (of course I am compiling a spreadsheet of error codes and most plausible diagnosis as well), nailing down the correct diagnosis would be a lot more efficient.
Thanks for your help.
It's easy. While your vehicle is running well, BEFORE your vehicle is displaying any driveabilty issues or throwing any codes make a record of your Live Data readings at different RPMs and conditions.
Make a note of them at different ECT readings too.
At cold start and warm start.
Most people never plug in their OBDII scanners until they're having problems.
Wouldn't it be nice to know if that MAF sensor reading at idle, when your having an issue,
is the same, or a different, MAF reading at idle, when your car is running well?
Create your own "baseline" of your Live Data readings when your vehicle is running well
and keep them for comparison when you have a problem
If only it were that simple.
https://www.springer.com/gp/book/9783540231394
My advice is to use conventional methods for monitoring engine health.
websites for the error codes do exist.
obd-codes.com
awww party foul. I was hopeful that I could make a basic chart, maybe narrow down to at least a system but maybe that is a stretch. Thank you for the resources @mountainmanjoe