07 Civic si Persistent P0135 FlashPro AFR Frozen
By Turbo07FG2
*Car:* 2007 Honda Civic Si Coupe, K20Z3 *ECU:* Keihin 37820-RRB-A12 *Engine management:* Hondata FlashPro, custom turbo tune *Mileage:* Nearly 300,000 miles I'm trying to diagnose a persistent...

