SRS Airbag Control Module Internal Fault
2020-2024 Citroën C4 Electric 🇩🇪
Description
The SRS airbag control module has detected an internal hardware or software fault.
Symptoms
- Airbag warning light on
- SRS system completely disabled
- All airbags inoperative
- Multiple SRS codes may be set
Common Causes
- ACM internal circuit failure
- ACM software corruption
- Power supply issue to ACM
- Previous crash event stored in module
Diagnostic Steps
- Check ACM power and ground circuits
- Read all stored SRS codes
- Check for crash event data
- Test ACM communication on diagnostic bus
- Inspect ACM connector
Repair Notes
Replace airbag control module. Module must be programmed to vehicle. Previous crash data means module must be replaced, not cleared.
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
B0085 on Other Vehicles
Citroën Ami
2020-2025 Electric 5.5kWh
Citroën Berlingo
2018-2024 1.2L I3 PureTech
Citroën Berlingo
2018-2024 1.5L I4 BlueHDi
Citroën Berlingo
2018-2025 1.2L I3 Turbo PureTech 110
Citroën Berlingo
2018-2025 1.5L I4 Diesel BlueHDi 100
Citroën Berlingo
2021-2025 Electric e-Berlingo 50kWh
Citroën Berlingo III FR
2018-2025 1.2L I3 Turbo PureTech 110
Citroën Berlingo III FR
2018-2025 1.5L I4 Diesel BlueHDi 100
Common Questions
What does code B0085 mean on a 2020-2024 Citroën C4?
B0085 stands for "SRS Airbag Control Module Internal Fault". The SRS airbag control module has detected an internal hardware or software fault.
What are the symptoms of B0085 on a Citroën C4?
Common symptoms of B0085 include: Airbag warning light on, SRS system completely disabled, All airbags inoperative, Multiple SRS codes may be set.
What causes B0085 on a 2020-2024 Citroën C4?
Common causes of B0085 include: ACM internal circuit failure, ACM software corruption, Power supply issue to ACM, Previous crash event stored in module.