I've posted before about my problems getting my Puma Thunder through its MOT due to emissions problems. The heroes at Pumashacked took a look at it for me, and replaced the O2 sensor and sparkplugs. What with that and a dose of Cataclean, we hoped it would get through a retest. But no luck; we got an engine warning light, and the MOT testers couldn't get their diagnostics system to talk to the car, so they couldn't test it. So now I'm worse off than before - I need to get the engine warning light diagnosed and get the system diagnostics working, before I can find out whether the emission problems have been sorted out. I need some help, preferably in the St Albans area - does anyone have any suggestions?