Here’s a pretty good video on diagnosing these leaks from Scotty Kilmer, if you are interested:
![ford engine codes p2251 ford engine codes p2251](https://bads.lt/en/wp-content/uploads/2020/02/OBD-klaidu-kodai.png)
![ford engine codes p2251 ford engine codes p2251](https://partsavatar.ca/cms/p2251-obd-ii-trouble-code-o2-sensor-negative-current-control-circuit-open-bank-1-sensor-1-solution-ecm/images/p2251-obd-ii-trouble-code-o2-sensor-negative-current-control-circuit-open-bank-1-sensor-1-solution-ecm-desktop.jpg)
Fuel Filler Neck– There is often a gasket where the fuel filler neck connects with the gas tank.
#FORD ENGINE CODES P2251 PLUS#
If you are getting that message, plus a P0455, it may save you a ton of time and money to replace the fuel cap and see if it goes away. Often, you’ll get a message informing you that the fuel cap is off even when it is on.
#FORD ENGINE CODES P2251 CODE#
![ford engine codes p2251 ford engine codes p2251](https://i.ytimg.com/vi/cLiEvwKQHz0/maxresdefault.jpg)
One of the most common trouble codes with the Ford Mustang is the P0455 code.