Gas gauge calibration unit

Pawned,

Thank you for that information.

It is good your solution worked for your car. While you price was very good, it came from China, and just the chip for the switch mode regulator costs more here. It makes me wonder if parts that do not meet spec, or other issues, end up being sold, in a gray market.

The solution I propose should work for many, it is not a single point calibration. It costs a few dollars more, but much less than some IVR being sold now. It will be possible to improve gauge linearity, something that is not very good in OEM system. It might be possible to set the 1/2 tank calibration, by pressing both buttons at the same time. It is a matter of code, and the way buttons are interpreted. I need more experience with that. Most systems I work with, have communication features and get the job done without buttons.