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.
A fault has been detected in the front crash sensor circuit, used to detect frontal impacts and trigger airbags/pretensioners.
Common causes
- high
Sensor damaged after minor impact
One of the most commonly reported causes for this code — check this first.
Typical part cost: $170-660
- medium
Corroded sensor connector behind bumper
A plausible cause — test and verify before replacing parts.
Typical part cost: $170-660
See all causes + fix costs
Create a free Wrenchify account to unlock the rest for B0101.
Unlock causesFree forever · No credit card
First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
Get the full step-by-step diagnosis
Create a free Wrenchify account to unlock the rest for B0101.
Unlock diagnosisFree forever · No credit card
Related codes
See related trouble codes
Create a free Wrenchify account to unlock the rest for B0101.
Unlock related codesFree forever · No credit card
Frequently asked questions
What does B0101 mean?
B0101 means "Front Crash Sensor Circuit Malfunction". It is a generic OBD-II code that points to a fault in the body.
What are the most common causes of B0101?
sensor damaged after minor impact; corroded sensor connector behind bumper — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
Get the full B0101 diagnosis for your vehicle
Year, make, model + step-by-step repair help — free plan included.