If the ABS warning light remains illuminated after starting the vehicle, what should you do?

• A. Investigate the ABS system and repair as needed
• B. Continue driving as normal
• C. Replace tires only
• D. Reset the vehicle computer by disconnecting the battery

Answer: (A)

An illuminated ABS warning light means the Anti-lock Braking System has a fault that the vehicle has detected. ABS uses wheel speed sensors and a control module to prevent wheel lock during hard or slippery braking, so when the light is on, the system may not function as intended. The safest course is to stop as soon as you can safely and have the ABS diagnosed and repaired by a qualified technician. Don’t assume normal braking will be unchanged, and avoid relying on ABS in an emergency situation until it’s fixed. Replacing tires won’t address an ABS fault, and resetting the computer by disconnecting the battery won’t solve the underlying issue.