A faulty brake master cylinder reservoir filter can cause the brake system indicator to illuminate after a cold start and then go off. Replacement of the reservoir filter will commonly fix this problem.
Car Problem Reports
Honda Prelude Faulty Master Cylinder Resevoir Filter Can Cause Brake Light After Cold Start
Honda Prelude Problem
Average Mileage: 98,500 mi (84,000 mi - 113,000 mi)
Visitor, 2001 Honda Prelude, 84,000 mi
Brake light on and emergency brake NOT being used. Happens most frequently when the temperature is cold.
Dealer repaired....but light still on.