Lane A and B failures

Time for a little trouble shooting to rule some things in or out and could use some more info from that flight.

If you have a dongle / laptop computer then hook it up and see what the problem is. You can download the fault logs and data and even run the engine and see whats causing it while plugged in. 

Did you try a another start once you landed and a mag check? How were your engine readings like fuel pressure, voltage, EGT, ect...? It may be just connections. Take a look at the ECU and its three connectors. Take each off and look at the pins and make sure they aren't burnt and make sure they are put back on tight. Don't over tighten and break them. You can apply a tad of dielectric grease. Check and inspect the engine for other loose items. 

Thanks for your reply Roger. I did hook up a dongle and no faults or logs were shown. Also no faults revealed on my dynon HDX. Problem is in lane B and suspect a bad spark plug. Waiting for new plugs to arrive. Any other thoughts on this?

Something is suspect here!
If you had Lane Warning Lights, You WILL have log entries.
If " ... NO Faults or Logs Were Shown...",  I suspect you were not actually Connected and Talking to the ECU.