Horn Circuit Malfunction
2018-2018 Lincoln MKX 3.7L V6
The 2018 Lincoln MKX is equipped with a 3.7L V6 engine. Below you'll find detailed b2600 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.
Description
Malfunction in the vehicle horn circuit. The horn does not sound or sounds abnormally.
Symptoms
- Horn does not sound
- Horn sounds weak
- Horn stuck on
- Intermittent horn operation
- Horn sounds different than normal
Common Causes
- Faulty horn
- Horn relay failure
- Clock spring failure (horn through steering wheel)
- Horn switch failure
- Wiring issue
- Corroded horn ground
Diagnostic Steps
- Test horn with direct power
- Check horn relay
- Test clock spring horn circuit
- Inspect horn switch
- Check ground connection
- Verify horn fuse
Repair Notes
Replace horn, relay, or clock spring. Check horn ground for corrosion.
Other Body Codes
- B0001Driver Frontal Stage 1 Deployment Control
- B0001Driver Frontal Stage 1 Deployment Control
- B0002Driver Frontal Stage 2 Deployment Control
- B0002Driver Frontal Stage 2 Deployment Control
- B0003Passenger Frontal Stage 1 Deployment Control
- B0003Passenger Frontal Stage 1 Deployment Control
- B0004Passenger Frontal Stage 2 Deployment Control
- B0004Passenger Frontal Stage 2 Deployment Control
- B0005Driver Knee Airbag Deployment Circuit
- B0005Driver Knee Airbag Deployment Circuit
B2600 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 B2600 mean on a 2018-2018 Lincoln MKX?
B2600 stands for "Horn Circuit Malfunction". Malfunction in the vehicle horn circuit. The horn does not sound or sounds abnormally.
What are the symptoms of B2600 on a Lincoln MKX?
Common symptoms of B2600 include: Horn does not sound, Horn sounds weak, Horn stuck on, Intermittent horn operation, Horn sounds different than normal.
What causes B2600 on a 2018-2018 Lincoln MKX?
Common causes of B2600 include: Faulty horn, Horn relay failure, Clock spring failure (horn through steering wheel), Horn switch failure, Wiring issue, Corroded horn ground.
Last updated: March 2026