"Michael A. Terrell" wrote in message
m...
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Here is a project using a readily avaible Ardino board. You can buy
the board on Ebay for $20

Harbor Freight has had the 98568 OBDII scanner on sale for as low as $40.
It's an Autel MS309. I bought one to ensure that I'll never need it. It
seems OK though there were no fault codes to read.

jsw