P0455 2010 Ford F150stx

Question

My truck has no fuel cap it came without one

Answer 1

HI there,

Even though the gas cap is the most common cause for this code, there are also other possible causes. One very common cause is the vent control valve. There is also a factory service bulletin for this vehicle as well.
P0455 FORD - Evaporative Emission Control System Leak Detected Gross Leak

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