Noticed a slight miss in engine later the check engine light came on. I checked for a code scanner gave a code P2098 down stream oxygen sensor. I had it checked Auto Zone, and O'reilly's auto parts stores. There scanners pointed to different oxygen sensors. Now I believe it some thing other than oxygen sensors. I believe the injectors were dirty I ran a bottle of injector cleaner in the fuel tank. {Techron fuel injector cleaner}. With in a short time the check engine light went off.