engine light codes (German, valve, engines, gas)

[bradyischamp]

i got two codes with my code reader

p0441 (p0441 P) = EVAP Emission Control System Purge Flow Fault

p0455 (P0455 P) = EVAP Emission Control Sysem Leak (Large)

anyone know if this is a gas cap problem or worse?

[IMOGAJAD]

Try this: OBD-II Trouble Code: P0441 Evaporative Emission Control System Incorrect Purge Flow OBD-II Trouble Code: P0455 Evaporative Emission Control System Leak Detected (no purge flow or large leak)

[bradyischamp]

thanks that is a good website. i could probably fix 0455 with new gas cap. my car is still under warranty i wonder if fixing both errors will cost me any money since its an emission thing.

[Zea mays]

Originally Posted by bradyischamp

i could probably fix 0455 with new gas cap.

That would be the easy fix. The only other fixes I can think of, in order of decreasing probability, are:

1. canister purge valve does not open;
2. vacuum sensor in the tank on the fritz; or
3. canister vent valve does not close.

The emissions test works by closing the vent valve, opening the purge valve, and having the engine draw down a vacuum in the tank/canister. If NO vacuum can be detected, DTC P0455 is set.

Slow leaks are more difficult to find.


BTW, I looked up the etymology of the word fritz and found this:

ORIGIN early 20th cent.: said to be a use of Fritz, with allusion to cheap German imports into the U.S. before World War I.

And does anyone here know that Robert Bosch (yes, that Bosch) traveled to America in 1883 at the age of 22 to work in the United States and “gain technical experience?” He returned to Stuttgart and set up his first machine shop in 1886 to manufacture magnetos for stationary internal combustion engines.

How times have changed.