Check engine light on?

Question

car has check engine light on took it to autozone and they tell me one of oxygen sensors something bout bank 1 oxygen sensor 2 i told him how come becuz i put all four oxygen sensors new like 6 months ago what can it be i check for loose wires check for broking wires they still look new can it be that the one that came up already went bad plz help cuz that light is annoying

Answer 1

try looking for a corroded connector contact. if u still can't find anything, try resetting the computer by disconnecting the (+) wire to the battery and letting set for a couple of minutes before reconnecting. when the computer restarts it should re-calibrate itself with the new sensors

Answer 2

you may also want to check rubber hoses and connectors, i had a similar issue and it turned out to be a small foam elbow piece had worn thin and was letting air out.  5$ to fix  

Answer 3

maybe you need to have the onboard computer reset, may be able to do so by unhooking your battery for a while then turn your key to the on position, the back to off, before reconnecting the battery.

Answer 4

I'm guessing that you have a v-6 engine sense you have 4 02 sensors. You could have a bad fuel injector  that causing it to show that a 02 sensor is bad , If a fuel injector is bad it will cause it to be running lean  and that will cause the 02 sensor not to be working right. My beat is that you have a bad fuel injector.