CEL(Check Engine Light)

Hi Guys,

I just came from Auto Zone store and here what they found in my truck, oxygen sensor #1 bank #2 low voltage, which one is this? I just replaced two oxygen sensors on passenger side last week and replaced two oxygen sensors on driver side last January. The other one they found is (Manufacture Control Fuel Air Metering). Can some one help guiding me to fix these problems. I don't want to bring it to shop unless I can't fix it myself. Thanks so much.:banghead: :banghead: :banghead: :banghead: :banghead:

sounds like you need a mass air flow sensor to me (that would be your manufacture control fuel air metering) your o2 sensors should be still ok if that latest you changed them was in jan.

Thanks for your replied. I will give it a try to see if it fixes it. One last question, is there other thing that could give this code (Manufacture Control Fuel Air Metering) that I could look into it before I start to replace Mass Air Flow Sensor. Thanks.

A vacuum leak such as bad intake manifold gasket will cause these too but usually gives some other codes as well.