Reference meaning
What does this code mean?
The wording below belongs to the named make and communication. Match the complete code, reporting module, model year and engine before applying it.
A code identifies a detected condition, not a part that must automatically be replaced.
Narrow by vehicle
A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
Before replacing a part
Record codes and freeze-frame data. Check battery condition, related codes and visible wiring or hose damage. Follow the vehicle's diagnostic procedure and test results before replacing parts.
Scan worksheet →Manufacturer wording
Source wording can vary by vehicle and suffix. It is shown as written, not as a universal diagnosis.
U2516IC-CAN BUS OFF TRANSMIT ERROR
Manufacturer communications
1Original wording in English
MAZDA
ENGINE NO CRANK ALONG WITH IMMOBILIZER MALFUNCTION. DIAGNOSTIC TROUBLE CODES P1260 (IMMOBILIZER SYSTEM PROBLEM) AND B1600/B1602 (KEY ID NUMBER CANNOT BE READ) AND/OR U2516 (IC-CAN BUS OFF TRANSMIT ERROR) MAY BE STORED IN MEMORY. MAZDA M-TIPS. *TT
Check vehicle applicability
1A listed vehicle is a research lead. Confirm the engine, production range and software in the manufacturer's information.
| Make | Model | Model year |
|---|---|---|
| Mazda | MAZDA3 ↗ | 2004 |
Can I keep driving?
A code alone cannot establish whether driving is safe. A flashing malfunction light, severe shaking, overheating, oil-pressure warning or loss of braking or steering needs prompt attention. Stop in a safe place and seek assistance when control or engine safety is affected. Follow the vehicle handbook.