My check engine light came on and a diagnostic scan indicated insufficient activity on O2 sensor, bank one, sensor two.I'm not familiar with how the four sensors are numbered. Are the banks numbered left to right, or front to rear?
On another issue, my ABS light recently came on. After receiving a recall notice for an ABS module I had that replaced. However, the ABS light remained on. Has anyone ever had to deal with an ABS malfunction. It's on a 98' Amigo, 3.2.

B1 S2 is usually the rear O2 on the 1/3/5 side of the engine, but check that for sure...is your engine longitudinal, or transverse?

THE ABS LIGHT IS ON BECAUSE THE REAR SPEED SENSOR HAS LOSTS IT SIGNAL.ALOT OF PEPOLE COME TO THE DEARLSHIP FOR THAT RECALL THINKING ITS GOING TO TURN OF THAT LIGHT AN IT DOESNT.GET UNDERNEATH THE TRUCK IN THE BACK.LOOK AT THE TOP OF THE DIFFERENTIAL.YOU,LL FIND A SENSOR.NOW FOLLOW THE HARNESS ALLTHE WAY TO THE LEFT REAR WHEEL.TO WHERE IT CONNECTS TO THE BODY HARNESS,LOOK CLOSLEY AT THAT CONNECTOR.YOU,LL PROABLY FIND THOSE WIRES BROKEN.ISUZU SELLS AN UPDATED SPEED SENSOR HARNESS ,BECAUSE THE O.E. WAS TOO SHORT AN THE WIRES KEPT BREAKING.PURCHASE THE HARNESS AN CUT THE CONNECTOR OUT,YOU,LL SEE WHAT TO DO,WHEN YOU GET THE NEW HARNESS,THIS REPAIR CAN BE DONE YOURSELF.THE HARNESS SELLS FOR 50 DOLLARS.IF YOU TAKE IT TO A SHOP,THEY PROABLY WONT KNOW WHAT TO DO UNLESS YOU GO BACK TO THE DEALER FOR THE REPAIR,AN THEY,LL CHARGE YOU ABOUT 200 TO FIX IT..............IF I,M RIGHT......KEEP US POSTED