Fix Cost
$500 - $1500
Parts & Labor
Difficulty
3/5
Moderate
1-2 hours
DIY Possible?
❌ No
Pro recommended
Category
Body
System
📖 What Does B0120 Mean?
The airbag system has detected a malfunction, which may be due to a faulty sensor, wiring issue, or software problem.
⚠️
Symptoms
- • Airbag warning light on
- • airbag may not deploy in a crash
- • or airbag may deploy unexpectedly.
🔍
Common Causes
- • Faulty airbag sensor
- • wiring issue
- • software problem
- • or a faulty airbag module.
Fix Guide
🛠️
Possible Solutions
1. Check the airbag sensor and wiring for damage or corrosion. 2. Update the airbag system software. 3. Replace the airbag module if faulty.
Required Parts
Tools
Multimeter
Scan tool
Wrench set
👨🔧
Need a Pro?
Complex codes like B0120 can be tricky. Don't risk it if you're unsure.
Quick Stats
Severity
Medium
DIY Friendly
No
Est. Time
1-2 hours
🔗
Related Diagnostic Codes
Other codes that may appear with B0120
B0100
Same System
B0100: Seat Position Sensor Malfunction
Medium
B0101
Same System
B0101: Body System Code B0101 - Lighting
Medium
B0102
Same System
B0102: Immobilizer System Malfunction
Medium
B0103
Same System
B0103: Audio System Malfunction
Medium
B0104
Same System
B0104: Airbag System Malfunction
High
B0105
Same System
B0105: Climate Control Blower Motor Fault
Medium
💡 Why These Codes Are Related:
- • Similar Issues: Same root cause or component failure
- • Related Problems: Often occur together due to system interactions
- • Sequential Codes: Progressive failure stages or multiple sensors
- • Same System: Components within the same automotive system