Immobilizer Control Module Communication
2007-2007 Mazda Tribute 3.0L V6
The 2007 Mazda Tribute is equipped with a 3.0L V6 engine. Below you'll find detailed b0104 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
The immobilizer control module is not communicating with the ECM/PCM. Both modules must agree before engine starting is allowed.
Symptoms
- Engine will not start
- Security light on
- No communication with immobilizer module
- Multiple no-start codes
Common Causes
- Immobilizer module failure
- CAN bus wiring issue between modules
- ECM/PCM fault
- Power or ground issue to immobilizer module
Diagnostic Steps
- Check CAN bus communication
- Test immobilizer module power and ground
- Scan both immobilizer and ECM for codes
- Check wiring between modules
- Try key relearn procedure
Repair Notes
Repair CAN bus wiring or replace immobilizer control module. Modules may need to be paired.
Related Codes
Other Body Codes
- B0001Driver Frontal Stage 1 Deployment Control
- B0002Driver Frontal Stage 2 Deployment Control
- B0003Passenger Frontal Stage 1 Deployment Control
- B0004Passenger Frontal Stage 2 Deployment Control
- B0005Driver Knee Airbag Deployment Circuit
- B0006Passenger Knee Airbag Deployment Circuit
- B0007Rear Left Side Airbag Deployment Circuit
- B0008Rear Right Side Airbag Deployment Circuit
- B0010Driver Side Airbag Deployment
- B0011Driver Side Airbag Deployment Circuit Open
B0104 on Other Vehicles
Common Questions
What does code B0104 mean on a 2007-2007 Mazda Tribute?
B0104 stands for "Immobilizer Control Module Communication". The immobilizer control module is not communicating with the ECM/PCM. Both modules must agree before engine starting is allowed.
What are the symptoms of B0104 on a Mazda Tribute?
Common symptoms of B0104 include: Engine will not start, Security light on, No communication with immobilizer module, Multiple no-start codes.
What causes B0104 on a 2007-2007 Mazda Tribute?
Common causes of B0104 include: Immobilizer module failure, CAN bus wiring issue between modules, ECM/PCM fault, Power or ground issue to immobilizer module.
Last updated: March 2026