EVAP system problem

[JDA1]

A diagnostic test on my 2008 Roomster 1.4 16V has shown that there is problem with the purge valve / wiring, consequently the engine management light is illuminated, the light can be reset but is soon illuminated again.

If the plug that is connected to the purge valve is disconnected and a 300 ohm resistor fitted across the 2 pins in the plug, this will prevent the  EML from being illuminated, is this correct?

The 2 pipes attached the EVAP charcoal container will be not be removed, if the EVAP charcoal container is removed on a regular basis this will enable any fumes in the container to vent to atmosphere?

Are my suggestions correct?

[Breezy_Pete]

Well the dc resistance of these purge valves is in the region of 25 Ohms,  so it would seem on the face of it to want a resistor closer to that value if you really want to kid the engine ECU that there's a purge valve there when there isn't.  A lower value of course means a higher current and a bigger wattage / physically bigger resistor, so maybe others have determined that 300 Ohms is close enough.

 

However. Why not just fix the problem? Have you looked at the wiring? Tried a replacement valve? It's a component (6Q0906517) that's common to dozens of VW group cars, so there's plenty on ebay at lowish prices. I picked one up last week for not much more than a tenner, delivered.  Scrapyard likely even cheaper if there's one nearby. Five minute job to replace, either yourself or by a friendly garage.

[JDA1]

Thanks, I had looked at the price of a new one!  I will try local scrap yards for a second hand one.