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DTC codes / B01xx · Airbags, seats, doors, lights and comfort systems / B0107

B0107Rollover Sensor Malfunction

B0107 indicates that the rollover sensor, which detects a vehicle tip or rollover event and triggers airbag and seatbelt deployment, has reported a malfunction to the supplemental restraint system (SRS) control module. The computer has detected an abnormal signal or circuit condition from the rollover sensor, often an open, short, or out-of-range voltage, and has stored this code while illuminating the SRS warning light.

SystemBody
Code typeGeneric (all makes)
SeverityHigh
Fix difficultyProfessional
AreaAirbags, seats, doors, lights and comfort systems

Symptoms you may notice

  • The supplemental restraint system (SRS) warning light stays illuminated on the dashboard.
  • The airbag system may be disabled, meaning airbags and seatbelt pretensioners will not deploy in a collision.
  • Often no symptoms besides the warning light, with no noticeable change in vehicle handling or performance.
  • In some vehicles, a message such as 'Service Airbag' or 'Check SRS System' appears in the driver information center.
  • Intermittent warning light operation if the fault is a loose connection or chafed wire.
  • The rollover sensor may fail to trigger deployment in an actual rollover event, compromising occupant protection.

Common causes, most likely first

  1. A faulty rollover sensor that has failed internally or lost calibration.
  2. Damaged, corroded, or disconnected wiring or connector at the rollover sensor.
  3. Water intrusion or physical damage to the sensor from a prior collision or environmental exposure.
  4. A blown fuse or poor ground connection serving the rollover sensor circuit.
  5. A malfunctioning supplemental restraint system (SRS) control module that misinterprets the sensor signal.
  6. Low battery voltage or charging system issues causing erratic sensor readings.
  7. Aftermarket accessories or improper prior repairs disturbing the sensor mounting or wiring.

How to diagnose and fix it

  1. Verify the code with a scan tool that can read supplemental restraint system (SRS) data and check for related codes in other modules.
  2. Inspect the rollover sensor connector and wiring for corrosion, looseness, or physical damage, and repair as needed.
  3. Check the sensor circuit fuse and ground connections, and test for proper voltage and continuity at the sensor connector.
  4. Measure the rollover sensor signal with a multimeter or oscilloscope and compare to manufacturer specifications to confirm sensor failure.
  5. If the sensor is faulty, replace it following the manufacturer's procedure, which often requires recalibration or programming.
  6. Clear the code and perform a road test to verify the warning light stays off and the system passes self-tests.
  7. If the code persists after sensor replacement, diagnose the SRS control module and its wiring for intermittent faults.

Rollover sensor faults that fool technicians

  • A common misdiagnosis is replacing the rollover sensor when the real problem is a chafed wire harness under a seat or near a sill plate, so always perform a wiggle test on the harness while watching live sensor data.
  • The rollover sensor is often mounted under the center console or front seat, and spilled drinks or floor leaks can corrode its connector, causing intermittent codes that only appear on bumpy roads.
  • Some vehicles require the new rollover sensor to be calibrated or initialized with a scan tool after installation, and skipping this step will immediately reset the code.
  • A weak battery or failing alternator can cause the SRS module to log a rollover sensor code due to low voltage during cranking, so check charging system health before condemning the sensor.
  • The code does not always mean the sensor itself has failed; a poor ground at the SRS module or a damaged clock spring can sometimes set related codes that mimic a rollover sensor fault.

Can I keep driving with B0107?

Because the rollover sensor is part of the supplemental restraint system, a malfunction can prevent airbags and seatbelt pretensioners from deploying in a rollover or severe collision, so driving is not recommended until the fault is repaired. If you must drive to a repair facility, avoid rough roads and any situation that could trigger a rollover, and keep the SRS warning light in mind as a sign that occupant protection is compromised.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

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