Immobilizer Key Count Exceeded
2014-2014 Lincoln MKX 3.5L V6
The 2014 Lincoln MKX is equipped with a 3.5L V6 engine. Below you'll find detailed b0105 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
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
- B0010Driver Side Airbag Deployment
- B0011Driver Side Airbag Deployment Circuit Open
B0105 on Other Vehicles
Lincoln Aviator
2003-2003 4.6L V8 DOHC
Lincoln Aviator
2004-2004 4.6L V8 DOHC
Lincoln Aviator
2005-2005 4.6L V8 DOHC
Lincoln Aviator
2020-2020 3.0L Twin-Turbo V6
Lincoln Aviator
2020-2020 3.0L V6 Twin Turbo
Lincoln Aviator
2020-2020 3.0L V6 Twin Turbo Hybrid
Lincoln Aviator
2021-2021 3.0L Twin-Turbo V6
Lincoln Aviator
2021-2021 3.0L V6 Twin Turbo
Common Questions
What does code B0105 mean on a 2014-2014 Lincoln MKX?
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 Lincoln MKX?
Common symptoms of B0105 include: Cannot program additional keys, Security light on, Key programming procedure fails.
What causes B0105 on a 2014-2014 Lincoln MKX?
Common causes of B0105 include: All key slots used, Immobilizer memory error, Unauthorized key programming attempt detected, Module requires reset.
Last updated: March 2026