Just as the title states. After a write, only at WOT the banks won't match in (mV) no matter how many key cycles I do. The only solution I've found so far is to let the car sit over night and cold start it the next day. After that, they read evenly. Reason this worries me is because the bank that stays "lean" is the opposite side that I have my wideband on. B1 stays lean by a difference of 50 mV while B2 goes to commanded.