Flashing CEL and Misfires

[Genny Guy]

So in the last 2 weeks, I've now had a flashing CEL twice. I do not have a log as I wasn't racing or doing anything out of the ordinary. Both times the flashing CEL has occurred right after start up and acceleration. Wasn't going fast, both times under 40mph. Spirited acceleration though (3800 RPM). Cylinders 2,4, and 6 are showing a misfire code simultaneously. However, there are no other error codes identifying what could else be going on. For those that don't know, those cylinders are all on the same side, the driver's side. CEL flashed for about 10 secs and then went away as if nothing had happened. I have tried over the last few days to replicate the conditions and "force" a CEL , but nothing. The car is driving perfectly normal and is still willing to go all out with no issues. But a flashing CEL should never be ignored.

I'm kinda at a loss for what could be triggering it and wondering if anyone else has had something similar happen where there's multiple cylinder misfires. Thoughts?

 

[GenesisAdvisor]

The only real clue is that it's contained to bank 2. Could be this, could be that, maybe xyzabc. Check your mods on that bank. Check for rodent damage. If performance is fine try going back to stock ECU. Check condition of plugs. If primary and secondary cats are still on might have damage. A GDS giving you live data will tell you what you need to know.

 

[Genny Guy]

The only real clue is that it's contained to bank 2. Could be this, could be that, maybe xyzabc. Check your mods on that bank. Check for rodent damage. If performance is fine try going back to stock ECU. Check condition of plugs. If primary and secondary cats are still on might have damage. A GDS giving you live data will tell you what you need to know.

The flashing light isn't constant though. I thought the issue would need to be happening live for me to get the data?