Front Impact Severity Sensor Circuit
2007-2012 Nissan Altima 2.5L I4
Description
Malfunction in the frontal impact severity sensor used to determine airbag deployment force level.
Symptoms
- Airbag warning light on
- SRS fault stored
- Dual-stage airbag staging may be incorrect
Common Causes
- Faulty severity sensor
- Wiring damage
- Control module fault
- Sensor mounting compromised
Diagnostic Steps
- Scan SRS codes
- Inspect severity sensor
- Check wiring to ACM
- Measure sensor circuit
- Verify sensor mounting
Repair Notes
Replace impact severity sensor. Ensure correct deployment staging by verifying ACM calibration.
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
B0039 on Other Vehicles
Nissan 200SX
1995-1998 1.6L I4 GA16DE
Nissan 200SX SE-R
1995-1998 2.0L I4 SR20DE
Nissan 240SX
1995-1998 2.4L I4 KA24DE
Nissan 300ZX
1990-1996 3.0L V6 VG30DE
Nissan 300ZX Twin Turbo
1990-1996 3.0L Twin-Turbo V6 VG30DETT
Nissan 350Z
2003-2006 3.5L V6 VQ35DE
Nissan 350Z
2007-2009 3.5L V6 VQ35HR
Nissan 370Z
2009-2020 3.7L V6 VQ37VHR
Common Questions
What does code B0039 mean on a 2007-2012 Nissan Altima?
B0039 stands for "Front Impact Severity Sensor Circuit". Malfunction in the frontal impact severity sensor used to determine airbag deployment force level.
What are the symptoms of B0039 on a Nissan Altima?
Common symptoms of B0039 include: Airbag warning light on, SRS fault stored, Dual-stage airbag staging may be incorrect.
What causes B0039 on a 2007-2012 Nissan Altima?
Common causes of B0039 include: Faulty severity sensor, Wiring damage, Control module fault, Sensor mounting compromised.