I can well imagine that this topic has been discussed here many times: My parents have taken my Vectra with me because of a defect and I’m now driving their omi. It’s a 98’s 2.5 TD caravan. In the Omega FAQ I have seen a solution approach to this problem and have a few questions now: 1. has someone found a cause for the problem by now? 2. How does a defective Hadelhub sensor noticeable itself?