I would have thought that 'ARTICULATION VALIDATION' would mean a height sensor is giving an iffy reading, but not enough to be declared faulty by the system. I think the system is being told that there is axle articulation (one wheel higher than the other), when it knows there isn't any, part of the "plausibility scenarios" the EAS ECU goes through. Is the car more wobbly than usual? This could indicate a fault with the cross-link valve which is supposed to increase articulation.Archie said: