Check Engine--the following two posts about Victor Roche repairing your ABS module is the only way to go. If you buy a new module, or worse, take the car into Volvo, you will be charged an arm and a leg and still have a new module that will fail you down the road. When Victor repairs it he upgrades the module with better parts, and it almost never fails after that, regardless of how long you keep the car or drive. When you remove the module you will need an E5 torx socket, not easy to find (and an E6 won't work), and using it on the end of a quarter-inch drive, feeling with your fingers to get it on the end of the male torx end, will try your patience. Be sure to place a piece of cardboard or something else under that section of the engine because you will probably fumble and lose of one those bolts down into the engine or onto the ground like I did. I had to search fifteen minutes before I found it wedged in a bracket. Once the ABS module is out, send it to Victor. You will have to email him for his address because he doesn't post it. Too many people driving Audis, Mercedez, VW's and the like send him their modules for repair, because they're all made by the same company in the Philippines or Malaysia, can't remember which, and he doesn't work on them. Your check engine light will come on when you remove it, but after you reintall it, it will go out after a dozen or so starts. Mine did, anyway, on my 97. I didn't have to go in to the dealer or some other garage and have it turned off. Dick