P0455 FORD - how can i tell if i have the wrong fuel cap?

Question

i have an 03 f250 hd pick up w 5.4

Answer 1

Hi there

This code is a gross evap leak. It could be the gas cap if you had the wrong cap however it wouldn't fit. Most of the time if the gas caps not the problem, then the problem is with the vent control valve. If it's stuck open you will get this code.

P0455 FORD - Evaporative Emission Control System Leak Detected Gross Leak

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