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Old 10-17-2011, 07:27 PM   #1
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Default 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.
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Old 10-17-2011, 07:28 PM   #2
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Quote:
Originally Posted by JasonC SBB View Post
Output synthesized O2 sensor signal to keep the factory ECU happy in piggyback system.
Very cool.


I wonder how long until they get a letter in the mail from the EPA and/or CARB?
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Old 10-17-2011, 07:49 PM   #3
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"They" is just one dude who made an OBD2 reader.
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Old 10-17-2011, 09:42 PM   #4
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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.
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Old 10-19-2011, 12:16 AM   #5
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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.
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