Need help with my H22A...

Today I checked i wanted to see what it was that was setting off the check engine light on my '93 Prelude VTEC. When i was done, i realized that there four codes, 7, 14, 15 and 22. I spoke to a friend of mine and he said that it might be due to the fact that when he previous owner did the JDM H22A swap, he used a different JDM ecu and not the one that came with the engine. He also said that another factor might be that the stock wiring harness was used during the swap, not the one that came with the motor. Can someone please help me out with any advice or suggestions about this, I would really appreciate it. Thank you for your time.