Well,
with my car I didn't have a code reader at first, and when the engine light would come on I would disconnect the battery and reset. I finally saved my pennies (got permission ha ha) and bought a scanner. I drove it that way for about a year because I didn't know what was wrong. The P0441 code just says it is incorrect purge flow pressure, so when I got the code I checked everything in that system, It could be a vacuum leak or loose hose, bad gas tank cap etc.. All of these things contribute to the problem. I tested my purge valve and it would not even click, they are supposed to make a clicking noise when activated, I just put 12 volts to it and nothing happened. I then knew that the purge valve was bad. I don't think it will hurt the car to drive it, however you should be extra careful of the pressure in the tank, and it may use more fuel since the purge valve opens and allows the intake vacuum to pull gas fumes from the charcoal cannister to burn in the engine, without it you are not getting the use of your fumes. This is basically an emission system so that you don't expel gas fumes into the air, rather burn them up in the engine and through the catalyst minimizing the pollution, so it will probably be ok that way, but here in Texas my car would not pass inspection unless it was repaired. The purge valve is electrically operated and is located in front of the ABS pump, it has a line coming from the firewall, (Charcoal cannister in trunk on 129) and then a line going to the intake manifold, both black plastic, and the valve itself says "MOT with an arrow pointing to the motor output side" Happy Benzing!
Brian

__________________
Brian W. Heitman

www.MBCA.org/northtexas

Join MBCA!!!