Final answer:
The red Brake warning light on the dashboard staying on indicates an issue with the braking system. The brake warning light could be activated due to low brake fluid, the parking brake being engaged, or a misadjusted parking brake switch, but not typically from a faulty ABS wheel sensor.
Step-by-step explanation:
A vehicle's red Brake warning light staying on can indicate several potential issues, but one listed scenario would not cause it: the ABS having a faulty wheel sensor. A faulty ABS (Anti-lock Braking System) wheel sensor typically triggers a different warning light specific to the ABS system. Instead, the brake warning light could be triggered by the following:
- Brake fluid being low in the reservoir, which could imply a leak or that the brakes need attention.
- The parking brake being engaged, even slightly, would cause this light to stay on.
- A parking brake switch that is out of adjustment may falsely signal that the parking brake is engaged.
It's important for safety to address any issue that results in the brake warning light staying illuminated when the engine is running.