Hi All, new to the club. Had a recent problem with my Signum 2.0DTi (75k). The car was jumpy whilst driving, however recently the management light comes and a i have loss of power. If I turn the engine off and on the management light goes off but comes back on following more jumping whilst gaining speed. I have also noticed increased exhaust fumes. Had the car on a friends Tech 2 which gave an AMM fault code. Has anyone else had any probs and if so has it been the AMM, as i dont want to replace it if it could be another faults.