I have posted previously about having had bad gas mileage ,about 15mpg on avg, so after replacing or cleaning everything from the maf, both 02 sensors, plugs, ect sensor, etc... I now get this trouble code. It came almost immediately after changing my o2 sensors which is odd since both of them were shot and not producing the correct voltage. Since the code came 2 days ago I have replaced the ect sensor and rechecked the o2 sensors and see nothing wrong. I have erased and reset the code using the efi after making any changes but it still won't go away.