Police code for emergency response is commonly Code 3. If you are listening to scanner traffic, it usually signals that a unit is responding urgently.
Many readers first encounter the phrase when they hear lights-and-sirens language in a dispatch stream, but the exact policy behind the response can still vary by agency.
For the numeric and context pages, compare Code 3 with the broader Police Scanner Codes page and the Police Codes Guide.
The common police code for emergency response
The most common answer is Code 3. In plain English, it usually points to an urgent response that deserves immediate attention.
Some agencies describe Code 3 as a lights-and-sirens response. Others use slightly different language, but the underlying idea is still urgency.
What Code 3 usually means
Code 3 often means a high-priority call where speed matters. A dispatcher, officer, or public safety user may use it when the situation needs a faster-than-normal response.
That makes it one of the easiest response codes to recognize, even for readers who are new to scanner traffic.
How it may be used in scanner or public safety context
Scanner listeners often hear Code 3 when units are dispatched to serious incidents or when urgency is being stressed over the radio.
The exact driving or response policy can vary, so the best reading is the common public meaning rather than a universal operating rule.
Related codes
Some departments use plain language or different response tiers. Agency policy and local response rules determine whether Code 3 is still the preferred term.
FAQ
Does Code 3 always mean lights and sirens?
Not always. It commonly means an urgent response, but the exact driving policy depends on the agency.
Is Code 3 the same as Code 4?
No. Code 4 usually means the scene is under control or no further help is needed.
Is Code 3 a scanner code or legal code?
It is a response or scanner code, not a legal code reference.
Where can I verify my local meaning?
Check current local agency materials or dispatch guidance for the exact wording used in your area.