Ignition output signal comes from the ignitor in the distributor. Check Connectors C210 and C209 on the pax side shock tower and make sure they are connected good. It could be an indication of a faulty ignitor or perhaps a weak coil. I would reset the ECU by pulling BackUp fuse for 20 secs and see if codes come back, if you find all connections good.

O2 sensor fault is unlikely to be a fuse since it's on the line w/ several other items. Check O2 sensor heater for open or short (it should be 15-20 ohms resistance).

You need a wiring diagram. Grab a manual from following link.

East Coast Honda Manuals

good luck