Originally Posted by the.Santorini

i've been getting 2096 lately too and after replacing both downstream sensors, it stills comes up. i have 114,400 miles. i've been changing out parts intended to wear anyhow so it doesn't bother me that the sensors are now new. but this narrows it down to a vacuum hose somewhere....and i may have pinpointed the cause. the small hose that goes between both air valves at the top of the engine is hard, flaky, and simply rubbing your finger along it turns your fingers black. i would say this hose has rotted and probably has many tiny holes/cracks in it causing too much air to get sucked in and resulting in a lean mixture. waiting for confirmation of this from other, more experienced, members. if they agree that the hose is bad, i will change out and hopefully put this to bed.