Air Brake Antilock Assembly problems of the 2000 Volkswagen Passat

My 2000 volkswagon Passat has started reporting errors, including brake faults, abs errors, check engine lights. I've taken it to mechanics and they are unable to find any problems. They simply reset the codes and send me on my way. A few hours of driving and the errors come back. All the errors are intermitent. It's incredibly frustrating. Others have experienced a similar problem and vw only says that our model year does not have significant issues to warrant a recall. There are hundreds of posts with these symptoms all over the internet. Please help.