My car has been still for a couple of days, I started her up, started first time and drove it a little. The engine management light has come on, it just stays on whilst im driving. If I turn the car off, then start it up again it goes off, then when i drive it for a few minutes it lights back up. When the light is on I don't get any VTEC. The car still drives fine, no dodgy idle ECT. Any ideas on what it could be? Its a 1.8c4/1.6a2 -poormans Type-R. All help would be appreciated.