have 1999 Installing 2004 Motor on 1999 Honda Odyssey

ECM on 2004 has 1 single plug on back side ECM on 1999 does not have this plug in the harness. have no fire and D4 flashing on steering column. Can you help Thank You. Harry

Asked by for the 1999 Honda Odyssey
Yes, put the right engine in the van. It will now cost you more than the van is worth.