OBD2 code B0101: Front Crash Sensor Circuit Malfunction
A fault has been detected in the front crash sensor circuit, used to detect frontal impacts and trigger airbags/pretensioners.
Detected Root Component
Body Component
Observed Symptoms
- Warning light or symbol related to the affected system
- Comfort or safety function impaired
Possible Causes
- Sensor damaged after minor impact
- Corroded sensor connector behind bumper
Tools Required
Interactive Diagnostic
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Diagnostic Result
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Parts likely to be the cause (Boîtier fusibles / BSI)
Boîtier fusibles / BSI
Photo d'illustration : Boîtier fusibles / BSI
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Frequently asked questions about code B0101
What does code B0101 mean? ▾
OBD2 code B0101: Front Crash Sensor Circuit Malfunction. A fault has been detected in the front crash sensor circuit, used to detect frontal impacts and trigger airbags/pretensioners.
What are the symptoms of code B0101? ▾
Code B0101 may cause: Warning light or symbol related to the affected system, Comfort or safety function impaired. The intensity of these symptoms varies depending on the vehicle and driving conditions.
What causes code B0101? ▾
The most common causes of code B0101 are: Sensor damaged after minor impact, Corroded sensor connector behind bumper. A proper OBD2 diagnostic will pinpoint the exact cause.
Is it serious to drive with code B0101? ▾
Code B0101 has moderate severity (Warning). Short-term driving remains possible, but a prompt check is recommended to prevent worsening.
How do I fix code B0101? ▾
Start by reading the code with an OBD2 scanner, then follow the interactive decision tree on this page. Priority causes to check: Sensor damaged after minor impact, Corroded sensor connector behind bumper. Difficulty: Easy · Estimated time: 30-60min.