During a roadside inspection, an officer finds that a CMV has an air brake system where the air compressor takes more than 3 minutes to build pressure from 85 to 100 psi. What does this indicate?

1. The system is operating normally; 3 minutes is within acceptable limits
2. The air compressor or related components are not performing properly, and this could be an out-of-service violation
3. The air tanks are too large for the compressor
4. The governor cut-out pressure is set incorrectly but the compressor is fine