Yup, it looks like its the front 02 sensor. When mine went bad the AP would read very lean while my wide band would go rich (very). It's a terrible idea to go WOT with a problem like that. When the O2 sensor is reading lean the ECU compensates with more fuel. I was seeing 25% AF Correction! Cruising AFRs were on the10's! Change that sensor and install the new one carefully this time then reset the ECU.