Green/Amber
The colour helps indicate urgency, but exact behaviour can vary by manufacturer.
Dashboard Warning Light
Differential Lock
Differential lock is engaged or the system has a fault. The usual first step is: Use only on suitable surfaces; inspect if a fault persists.
Varies by state
Use this as a quick triage label before confirming in your owner manual.
Use only on suitable surfaces; inspect if a fault persists
Check the matching manual page for your exact brand, model and year when possible.
What it usually means
Differential lock is engaged or the system has a fault.
What to do next
Use only on suitable surfaces; inspect if a fault persists. If the vehicle feels unsafe, stop in a safe place and arrange professional inspection.