Talk:OBD-II PIDs
From Wikipedia, the free encyclopedia
PID $23 is not limited to diesel engines, any engine where the fuel rail pressure is greater than that allowed by PID $22 may use it, gasoline direct injection for instance. Manufactures are required to report on one of the 3 fuel rail pressure PIDs PIDs $0A $22 or $23 if a fuel rail pressure sensor is fitted to their vehicles.
Rich and Lean fuel trims were switched. A negative fuel trim means the initially calculated fuel amount is too much (Rich) to achieve the desired Air/Fuel Ratio (14.7:1 under most driving conditions), and the ecm has to remove (hence the negative) a percentage from the calculated fuel amount. 68.84.176.20 06:15, 5 May 2007 (UTC)
I also have some douts on the PID=0x23 line that is marked with "?". Some sources state that the return will be packed in 2 bytes. Some sources sugest a convertion factor of 10 to achieve a result in kPa.
[edit] Merger proposal
The Table of OBD-II Codes seems that it should merged into this article because there is more information here. — CZmarlin (talk) 04:21, 2 January 2008 (UTC)
-- Agreed! Davide Andrea (talk) —Preceding comment was added at 17:59, 6 January 2008 (UTC)
-- Comment The OBD-II codes themselves are property of the Society of Automotive Engineers. 64.26.98.90 (talk) 17:09, 19 January 2008 (UTC)
-- Done. Davide Andrea (talk) 20:53, 29 February 2008 (UTC)
