2000 grand marque

I hooked up my obd 2 scanner tool to my 2000 grand marque and it has bank 1 and bank 2 is running rich what does that mean? Ive done a lot to fix my car but the only up grades i have are a cold air intake an a throttle body spacer ..the car has 193,833 miles on it. Y is bank 1 an bank 2 running rich

I hooked up my obd 2 scanner tool to my 2000 grand marque and it has bank 1 and bank 2 is running rich what does that mean? Ive done a lot to fix my car but the only up grades i have are a cold air intake an a throttle body spacer ..the car has 193,833 miles on it. Can you tell me why bank 1 and bank 2 is running rich ..the tool said the o2 sensors are good so i dont know why its running rich

realize cold air intakes will do that too, make the data incorrect and fool the ocmputer. See that a LOT

false