Not likely. That code refers to a vapor leak.
Trouble code P0442 means:Evaporative emission control system leak detected (Small leak)
is it hard to fix a manifold leak on a 351 ford engine
Trouble code P0455 means: Evaporative Emission System Leak Detected (gross leak/no flow)
If the check engine light has not come on, it is most likely a vaccume leak.
if your vehicle has computers, this can cause check engine light to come on,as a coolant leak ends up sending trouble message to computer
intake gasket on rear of engine on top between intake and block 302's leak there alot
engine oil leak
fuel leak on top of what type of engine, gas or diesel?
A vacuum leak could cause that.
Trouble code P0455 means: Evaporative emission (EVAP) control system leak detected (no purge flow or large leak)
Trouble code P0442 means:Evaporative emission control system leak detected (Small leak)