Arduino to read OBD2 short and long term trims
 

http://www.arduino.cc/cgi-bin/yabb2/...num=1291833804

Read OBD2 short and long term fuel trims.
Output synthesized O2 sensor signal to keep the factory ECU happy in piggyback system.
Profit.

Very cool.


I wonder how long until they get a letter in the mail from the EPA and/or CARB?

"They" is just one dude who made an OBD2 reader.

it plugs into the OBDII port?

if so, then it's almost worthless. you have to unplug it to test the car... and it wont have an input anymore.

If you unplug it then your ECU will default to assuming the long term trim is zero. It will take longer than a smog test to make long term trim drift into the throw-a-CEL range.