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You can find out a lot from reading the label on a OBD1 ECU. This applies mainly to the Civic ECUs... dunno bount the integra ones.


Digits Meaning
ABC Engine ECU designed for
X Market of ECU - see chart below
Y 0: 5-speed, 5: Auto
Z even number: "11F0" board, odd number: "1720" board

Code Market
Axx USDM 49-state
Lxx USDM Cali Emissions
xxx JDM
9xx JDM (auto)
Qxx Oz DM
Cxx Canadian
Nxx usually factory reprogrammed, no particular market



  • P28 = SOHC Vtec D16Z6
  • A = US, 49 state
  • 5 = Auto
  • 2 = "11F0" board

Library.LabelDecode moved from Library.OBD1LabelDecode on 21 Apr 2004 - 15:31 by Home.blundar - put it back

Revision: r1.3 - 19 Sep 2004 - 19:21 GMT - blundar { Edit | Attach | History | More }
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