davieboot
11-23-2011, 04:11 PM
My 2004 XC70 has had the AWD working intermittently in the snow. Often it works as it should, but occasionally it doesn't work at all. I first noticed this last winter while starting from a complete stop in the snow on level ground (very wet, slippery snow). The traction control dash light came on, and the front tires spun, but there was no power to the rear. This was the first time I had seen a problem after many years in the snow. Since then it works some times. In some instances, it works goes from not working to working, but I can't seem to force it (restarting the car, pressing the W button, manually shifting, etc).
Since winter is coming up again soon, I realized I hadn't taken care of it. I brought it to the local specialist. He said that when it was on the lift, power was getting to the back wheels. But he also said he was unable to talk to the DEM. The codes were DEM-E000 and CEM-1A64. So things aren't communicating correctly. His suggestion is to get the software update (in the $300 range) first. If that doesn't work, he believe the next step is a new DEM (way more expensive).
Anyone see this problem? I've read about several different issues, include the pressure gauge in the DEM, but the codes are not necessary consistent with that. Any ideas?
Since winter is coming up again soon, I realized I hadn't taken care of it. I brought it to the local specialist. He said that when it was on the lift, power was getting to the back wheels. But he also said he was unable to talk to the DEM. The codes were DEM-E000 and CEM-1A64. So things aren't communicating correctly. His suggestion is to get the software update (in the $300 range) first. If that doesn't work, he believe the next step is a new DEM (way more expensive).
Anyone see this problem? I've read about several different issues, include the pressure gauge in the DEM, but the codes are not necessary consistent with that. Any ideas?