Passenger Frontal Stage 2 Deployment Control
2000-2006 Lincoln LS 3.0L V6
Description
Malfunction in the passenger frontal airbag stage 2 deployment circuit. The stage 2 inflator provides additional inflation force during severe frontal collisions.
Symptoms
- Airbag warning light on
- Passenger airbag OFF indicator illuminated
- SRS system fault stored
- Airbag may not deploy fully in a crash
Common Causes
- Faulty airbag inflator module
- Damaged wiring harness under dash
- Airbag control module failure
- Corroded connector at airbag module
Diagnostic Steps
- Scan SRS module for codes
- Inspect passenger airbag connector
- Measure circuit resistance
- Check wiring harness from module to airbag
- Verify airbag control module power and ground
Repair Notes
Professional airbag service required. Do not attempt DIY airbag repairs. Disconnect battery and wait 10 minutes before working near airbag components.
Related Codes
Other Body Codes
- B0001Driver Frontal Stage 1 Deployment Control
- B0002Driver Frontal Stage 2 Deployment Control
- B0003Passenger Frontal Stage 1 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
- B0012Driver Side Airbag Deployment Circuit Short to Ground
B0004 on Other Vehicles
Lincoln Aviator
2003-2005 4.6L V8
Lincoln Aviator
2003-2005 4.6L V8 DOHC
Lincoln Aviator
2020-2024 3.0L Twin-Turbo V6
Lincoln Aviator
2020-2024 3.0L V6 Twin Turbo
Lincoln Aviator Grand Touring
2020-2024 3.0L Twin Turbo V6 PHEV
Lincoln Aviator Grand Touring
2020-2024 3.0L Twin-Turbo V6 Hybrid
Lincoln Aviator Grand Touring
2020-2024 3.0L V6 Twin Turbo Hybrid
Lincoln Blackwood
2002-2002 5.4L V8
Common Questions
What does code B0004 mean on a 2000-2006 Lincoln LS?
B0004 stands for "Passenger Frontal Stage 2 Deployment Control". Malfunction in the passenger frontal airbag stage 2 deployment circuit. The stage 2 inflator provides additional inflation force during severe frontal collisions.
What are the symptoms of B0004 on a Lincoln LS?
Common symptoms of B0004 include: Airbag warning light on, Passenger airbag OFF indicator illuminated, SRS system fault stored, Airbag may not deploy fully in a crash.
What causes B0004 on a 2000-2006 Lincoln LS?
Common causes of B0004 include: Faulty airbag inflator module, Damaged wiring harness under dash, Airbag control module failure, Corroded connector at airbag module.