[shorod]

You really need to get the code checked to determine what the likely reason was. Maybe the Echo has a code for "engine overrev occurred" or similar. Many of the chain auto parts stores will read the codes at no cost. Even though the light is currently not illuminated, there will still be a stored code. It might be a manufacturer-specific code that the parts store won't have a definition for, but in that case you could post the exact code number on the appropriate forum and expect an explanation.

-Rod