B0124high severityBody
Theft Deterrent System Starter Disable
on 2001 Mazda MX-5 Miata 1.8L I4 · RWD
What this code means
The theft deterrent system has disabled the starter circuit due to a detected theft condition or system malfunction.
Symptoms
- Engine will not crank
- Security light on solid
- Key turns but starter does not engage
- No-crank no-start condition
Common causes
- Theft system triggered by incorrect key
- System malfunction falsely detecting theft
- BCM starter relay driver failure
- Immobilizer-theft system communication error
Diagnostic steps
- Verify key is correct for vehicle
- Perform theft system reset procedure
- Scan BCM and immobilizer codes
- Test starter relay control circuit
- Check theft system arm/disarm status
Repair notes
Perform theft system relearn or reset. If BCM is faulty, replace and program.
Other Body codes on this vehicle
B0001
Driver Frontal Stage 1 Deployment Control
B0002
Driver Frontal Stage 2 Deployment Control
B0003
Passenger Frontal Stage 1 Deployment Control
B0004
Passenger Frontal Stage 2 Deployment Control
B0005
Driver Knee Airbag Deployment Circuit
B0006
Passenger Knee Airbag Deployment Circuit
B0010
Driver Side Airbag Deployment
B0011
Driver Side Airbag Deployment Circuit Open
B0012
Driver Side Airbag Deployment Circuit Short to Ground
B0013
Driver Side Airbag Deployment Circuit Short to Battery