when i brought my vectra sri150 a couple of weeks ago i found a broken wire next to the lambda sensor i fixed this, then after 150 miles or so the eml light came on. i took it to a garage had it 'plugged in' they said it showed fault corrected and no other faults or codes shown, and so the light was turned off.After driving it for another 150 miles the light came back on i read on an old post on this site to disconnect the battery for 30mins to reset the ecu, i have done this which has now turned off the eml light. the only thing i have done to the car since the garage 'plug in' was took off a stupid max power air filter(which previous owner fitted) and fitted a standed air box and filter. could this of turned on the eml light or is there going to be a fault and the light come on again? the car runs and drives prefect no problems at all.