hello everyone, i’ve owned my 2014 fiesta st for over a year now and every since i got it i’ve had this check engine light/ engine code pop up even after clearing it multiple times. the car acts and drives normal (so it seems) except for whenever i fill up on gas it will have a rough idle and even has stalled out. while rough idling the AFR’s will go crazy from rich to normal to rich to lean. if you get in it after fill up and drive off it seems to act normal only does the rough idle and shiz while sitting at idle after fill up. i’m not sure where the “fuel sensor B” is located or if it could be going bad. if anyone has any ideas it would be very appreciated! thanks
Just a little update, replaced the sensor on the firewall and it didn’t make the code go away. Wonder if changing the fuel pressure sensor on the valve cover would fix, gonna try it soon and report back.
Just a little update, replaced the sensor on the firewall and it didn’t make the code go away. Wonder if changing the fuel pressure sensor on the valve cover would fix, gonna try it soon and report back.
Last edited:
