Faulty rollover sensor (internal failure or damage); Damaged or corroded wiring or connectors at the rollover sensor; Poor electrical connection at the airbag control module; Water intrusion or physical damage to the sensor or its mounting area; Failed airbag control module (less common); Low battery voltage or charging system issues causing erratic sensor signals

DTC codes / B00xx · Airbags, seats, doors, lights and comfort systems / B0070

B0070Vehicle Rollover Sensor

Q: What does code B0070 mean?

Vehicle Rollover Sensor. B0070 indicates that the vehicle's rollover sensor, which detects a rollover event and triggers the airbag and seatbelt systems, has reported a fault to the airbag control module. The computer has detected an abnormal signal or circuit condition from the rollover sensor, often setting the airbag warning light and disabling the rollover protection.

B0070 indicates that the vehicle's rollover sensor, which detects a rollover event and triggers the airbag and seatbelt systems, has reported a fault to the airbag control module. The computer has detected an abnormal signal or circuit condition from the rollover sensor, often setting the airbag warning light and disabling the rollover protection.

SystemBody

Code typeGeneric (all makes)

SeverityHigh

Fix difficultyProfessional

AreaAirbags, seats, doors, lights and comfort systems

Symptoms you may notice

Airbag warning light illuminated on the dashboard
Supplemental restraint system (SRS) warning message displayed
Often no symptoms besides the warning light
Airbag system may be disabled, including rollover protection
In some vehicles, the seatbelt pretensioners may not deploy in a rollover
Intermittent warning light due to loose connections or sensor faults

Common causes, most likely first

Faulty rollover sensor (internal failure or damage)
Damaged or corroded wiring or connectors at the rollover sensor
Poor electrical connection at the airbag control module
Water intrusion or physical damage to the sensor or its mounting area
Failed airbag control module (less common)
Low battery voltage or charging system issues causing erratic sensor signals

How to diagnose and fix it

Inspect the rollover sensor and its wiring for visible damage, corrosion, or loose connections
Check for technical service bulletins (TSBs) or recalls related to the rollover sensor for the specific vehicle
Use a diagnostic scan tool to read and clear the code, then verify if it returns
Perform a continuity and resistance test on the sensor circuit according to the manufacturer's specifications
If the sensor is faulty, replace it with a new unit and clear the code
If the airbag control module is suspected, test or replace it as needed
After repair, clear codes and verify the airbag warning light operates correctly

Rollover sensor faults often misdiagnosed

A common mistake is replacing the rollover sensor without checking the wiring harness, which is frequently the real culprit due to chafing or corrosion.
The rollover sensor is often located under the center console or seat, where spilled drinks or water can cause intermittent faults.
Some vehicles use the same sensor for both rollover detection and vehicle stability control, so a fault may also affect the electronic stability program (ESP).
A weak battery or poor ground connection can cause the airbag control module to set false rollover sensor codes, so always check the charging system first.
After any airbag system repair, the system must be properly initialized and the codes cleared with a scan tool to ensure the warning light goes out.

Can I keep driving with B0070?

It is not safe to drive with an active B0070 code because the rollover protection and possibly other airbag functions are disabled, increasing the risk of injury in an accident. Have the vehicle diagnosed and repaired by a qualified technician before driving, and avoid any harsh maneuvers or off-road driving.

Tools that help

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