what RPM were you at when it came on? If it comes on at the RPM regardless of gear, there is a problem. If it came on and went off, I'd be more will to call it a glitch.
<span style='color:gray'><span style='font-family:Courier'>1995 e36 3 Series RIP
1999 e46 3 Series BURN IN HELL
2000 MR-S Roadster= Current</span></span>