In freezing weather, why might a driver notice the low air pressure warning activate suddenly even though the tanks seemed full moments earlier?

Pick an answer

1. Cold weather always increases air pressure readings rather than lowering them overnight
2. It indicates the parking brake was engaged intentionally
3. Ice may have formed and blocked a line or valve, disrupting normal air pressure delivery
4. The warning system only functions in warm weather

Correct!

Not quite. The correct answer is highlighted.