So I did some searching, no real answer to this code. My car threw this code and misfire on cylinders 2 and 4. My current set up is stage 2 e85 with 1000cc deatschwerks injectors. I recently as I mean not even two days ago put on my turboXS fmic. I feel like I might have a slight boost leak but am not sure. I can hear slight whirling/whistling sound on boost, at idle the car is running -23 to -22 boost. When I am driving and let off the gas and let start deceleration in gear my boost goes -24. Hummm don't know what else to say. I've enclosed a picture of the access port. At idle my AF learning A is like +17-+19. D is 0. What else humm. Ideas guys?
Oh yea I know this bad but I heard a little bit of popping at idle and it idled rough then cleared up.
I don't know if you found the issue, but I had that code and found out that it had to do with misfires. I don't think it is serious, mine was due to bad gas.