JL1000

Twice this week I've thrown engine code 2177- which looks to be " system too lean off idle bank 1"

I have a 2018 c43 stock except for jb4 tune usually running map 2 with a 25% e85 mix. Any ideas what could cause this. I do have the jb4 green wire under the airbox connected also.

Anything in the logs I should look for?

BMS

Does it happen after you do a pull? If so, post a log so we can check it out.

-Payam

JL1000

the two times it happened thus far were seemingly random. once while under normal driving/low rpm and once after a quick blip of the the throttle . I'll see if I'm able to grab a log if it happens again.

BMS

Just a false alarm fault you'll see on E85 mixtures some cars see from time to time. If it comes up just delete it.

JL1000

Great thank you!