Anyone see this DTC combination before?
 

Hey all,

Last night I got the traction control + check engine lights come on. I parked at home, turned off the car and tried to turn it on to see what would happen. The engine wouldn't turn.
Plugged in Ecutek and saw P0171 (system too lean bank 1), P117b (DI fuel performance Does not come on DTC), and C1201 (an ABS code with no description).

I've been running ACE 350 + Flex Fuel (Delicious Tuning) + DT E85 tune for about 5 months. Recently been using E85 primarily for past 4 tanks, switched back to premium, then got another E85 tank. The station is a few blocks away and no one ever uses it, so it's convenient.

I noticed my air intake housing was loose so I'm going to try MAF cleaner. Also, heard a noise from the header area some time ago so going to ask the shop to check for a leak.

My research isn't pulling up a good solution other than to try those two things, so if I find out what it is I'll post it here. If you have seen this can you let me know the potential issue?

Thanks

are you running catless header?

You indicated the engine won't turn. Is you battery drained? I've read where a failing battery will give weird symptoms.

If it's not turning over at all, you probably have an electrical problem, likely the battery or some connection to the battery. Aftermarket headers increase engine bay heat (those factory heat shields are pretty good at insulation) which can contribute to battery issues.