View Full Version : Lambda sensor VW Golf mk3 1.8

10-04-2007, 12:16 PM
Hi all,
My engine is running rich and all indications point to a faulty lambda sensor. Changing out the lambda isn't a big deal but I'm curious about one thing. When I look at the sensor wire from the exhaust it runs to a connector above one of the engine mounts. On other side of that connector are the wires running to the CPU (I presume). There are 4 wires altogether but one of them, furthest left, is just hanging out in mid air. I don't know of anyone else with a mk 3 Golf so I can't check with them so I'm asking here if this is normal or if all 4 wires should be connected?