P0445 has to do with the evaporative system and could be something as simple as a loose or leaking gas cap. Check that first. If the cap is good (new) and you still have the problem after clearing the code, there is a leak somewhere in the fuel system involving the filler tube, tank, filter or evaporative canister and sensors.
Ok, thanks. I mistakenly put po445 but is po455, is there any difference? Sorry for the mistake
P0455 OBD-II Trouble Code
Evaporative Emission Control System Leak Detected (no purge flow or large leak) What does that mean?
This indicates a fuel vapor leak or lack of purge flow in the EVAP control system. It means a large leak has been detected. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine. Symptoms
You likely won't notice any drivability problems. Causes
A code p0455 most likely means one or more of the following has happened:
A loose or improperly affixed gas cap
A non-conforming gas cap (i.e. not factory/original brand)
Other leak or damaged piece in EVAP system
With a p0455, the most common repair is to:
Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back.
Otherwise, replace the gas cap, and/or
Inspect the EVAP system for cuts/holes in tubes/hoses (you may hear a vacuum noise or smell fuel), repair if necessary
There may be leaks in the fuel filler neck. Basically, there is a sensor that is detecting a lack of pressure within the fuel tank emissions system and signalling this to the engine management computer. Very possible a new cap will fix this, though.
I cant tell you hoe many times I had a CEL come on when I get gas cause the guy pumping it didn't put the cap on right........ or at all. Yea we dont pump our own gas in NJ but I would MUCH rather do it myself!