From $100, they've gotten cheap enough that anyone should be able to afford one:

Know Your Car Inside And Out: How To Hack It : Diagnose Me

I just wish you could reset TPMS on the 2010 Fit with one. From what I've read it's not possible...

Still, it'd be fun to use for the other stuff!

 

I am glad these have become more accessible and more affordable in the past few years. It is unfortunate that many other systems on the car (TPMS, SRS, ABS) can only be accessed by manufacturer-specific computers and programs.

 

Hello Tom

Please check this Thread on

How to Read Your Car’s Trouble Codes ?

1. Step 1: Plug the www.mapout24.com/product-category/obd-diagnostic-cables/]OBD scanner[/url] into the OBD port. ...

2. Step 2: Turn on the ignition. ...

3. Step 3: Enter the Vehicle Identification Number. ...

4. Step 4: Find www.mapout24.com/product-category/obd-diagnostic-cables/]OBD codes[/url] in the menu. ...

5. Step 5: Interpret the first character of the OBD code. ...

6. Step 6: Interpret the second character of the OBD code

1. Step 7: Interpret the third character of thewww.mapout24.com/product-category/obd-diagnostic-cables/] OBD [/url]code
2. Step 8: Interpret the final characters of the OBD code