B0101 on Hyundai
Electronic Frontal Sensor 2 Malfunction
B0101 on Hyundai vehicles indicates electronic frontal sensor 2 malfunction. Au7o has documented this code across 1 Hyundai model — most commonly on Elantra. This is a safety-system (SRS/airbag) code, so it should be taken seriously. Modern cars use frontal impact sensors that detect a crash and tell the airbag control module when and how to deploy the airbags. B0101 indicates the airbag (SRS) control module detected a malfunction or circuit fault with frontal impact sensor 2 — meaning the sensor or its wiring isn't reporting correctly, so the module may not be able to rely on it in a collision. This typically lights the airbag warning lamp and can disable airbag deployment until repaired, which is a genuine safety risk in a frontal crash. Note this is a manufacturer-specific code, so the exact sensor location and meaning can vary by make.
Common Causes of B0101
- •Failed front impact/frontal crash sensor (sensor 2)
- •Damaged, corroded or unplugged sensor wiring/connector
- •Connector or wiring damage from a prior collision or repair
- •Water intrusion or corrosion at the sensor connector
- •Poor ground or open circuit to the sensor
- •Faulty airbag (SRS) control module
- •Sensor not properly seated or improperly mounted after service
B0101 on Hyundai by Model
Hyundai Elantra(1 issue)
- Airbag Sensor and Control Module Malfunction2007-2013
Multiple airbag-related recalls affect Elantras due to driver seat track position sensor issues and passenger weight sensor contamination. The driver's airbag may deploy at incorrect pressure, and the passenger airbag may deploy regardless of occupant weight. Nearly 285,000 vehicles were recalled.
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View B0101 across all makes →Frequently Asked Questions
What does B0101 mean on Hyundai?▼
B0101 stands for "Electronic Frontal Sensor 2 Malfunction." This is a safety-system (SRS/airbag) code, so it should be taken seriously. Modern cars use frontal impact sensors that detect a crash and tell the airbag control module when and how to deploy the airbags. B0101 indicates the airbag (SRS) control module detected a malfunction or circuit fault with frontal impact sensor 2 — meaning the sensor or its wiring isn't reporting correctly, so the module may not be able to rely on it in a collision. This typically lights the airbag warning lamp and can disable airbag deployment until repaired, which is a genuine safety risk in a frontal crash. Note this is a manufacturer-specific code, so the exact sensor location and meaning can vary by make. On Hyundai specifically, this code is documented across 1 model.
What causes B0101 on Hyundai vehicles?▼
Common causes on Hyundai: Failed front impact/frontal crash sensor (sensor 2), Damaged, corroded or unplugged sensor wiring/connector, Connector or wiring damage from a prior collision or repair, Water intrusion or corrosion at the sensor connector, Poor ground or open circuit to the sensor. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix B0101 on a Hyundai?▼
Repair costs vary widely depending on the root cause and specific Hyundai model.
Which Hyundai models have B0101 documented?▼
Au7o has documented B0101 on 1 Hyundai model: Elantra.