Immobilizer Key Count Exceeded
2018-2025 Fiat Cronos 1.3L I4 Flex Firefly
Description
The maximum number of keys programmed to the immobilizer system has been exceeded or the key count is invalid.
Symptoms
- Cannot program additional keys
- Security light on
- Key programming procedure fails
Common Causes
- All key slots used
- Immobilizer memory error
- Unauthorized key programming attempt detected
- Module requires reset
Diagnostic Steps
- Check number of keys programmed
- Attempt key count reset procedure
- Scan immobilizer for stored key data
- Verify key programming with dealer tool
Repair Notes
Use dealer tool to reset key count and reprogram all valid keys.
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
- B0009Rear Center Airbag Deployment Circuit
- B0010Driver Side Airbag Deployment
B0105 on Other Vehicles
Fiat 124 Spider
2017-2020 1.4L I4 Turbo
Fiat 126p Maluch
1973-2000 0.65L I2 Air-Cooled
Fiat 126p Maluch
1987-2000 0.7L I2 Air-Cooled
Fiat 500
2012-2019 1.4L I4
Fiat 500 Abarth
2012-2019 1.4L I4 Turbo
Fiat 500 BR
2011-2020 1.4L I4 Flex Fire Evo
Fiat 500 PL
2007-2025 1.0L I3 Hybrid FireFly 70
Fiat 500 PL
2007-2025 1.2L I4 Fire 69
Common Questions
What does code B0105 mean on a 2018-2025 Fiat Cronos?
B0105 stands for "Immobilizer Key Count Exceeded". The maximum number of keys programmed to the immobilizer system has been exceeded or the key count is invalid.
What are the symptoms of B0105 on a Fiat Cronos?
Common symptoms of B0105 include: Cannot program additional keys, Security light on, Key programming procedure fails.
What causes B0105 on a 2018-2025 Fiat Cronos?
Common causes of B0105 include: All key slots used, Immobilizer memory error, Unauthorized key programming attempt detected, Module requires reset.