Differential lock

What it means

This usually means a differential lock is engaged or selected, which helps maintain traction by limiting wheel-speed differences. Amber commonly indicates an active or selected drivetrain mode, but colour and whether the lamp means engaged, requested, or a fault vary by manufacturer; check the owner’s manual.

What the symbol looks like: An axle or differential outline with a locking indication, often shown as “LOCK” or a drivetrain diagram, commonly indicates differential lock; designs vary.

Why it comes on

• The driver selected a differential-lock mode
• The system is completing engagement or disengagement
• The vehicle is using a low-speed traction mode
• A switch, actuator, or position sensor fault, if the indicator flashes or remains unexpectedly on

What to do

1. Check the owner’s manual to identify which differential is locked and when to use it.
2. Use the lock only on surfaces and at speeds permitted by the manual.
3. Disengage it when returning to normal driving, using the model-specific procedure.
4. If the light flashes, will not disengage, or appears without selection, avoid tight turns and have the system checked.

Can I keep driving?

A locked differential is generally intended for low-speed use on loose or slippery surfaces, according to the manual. Avoid high speeds and tight turns on firm surfaces while it is locked.