This code indicates that the vehicle's control module has detected a signal from the multi-axis acceleration sensor 'B' that is out of its expected range or not performing within specifications. This sensor measures lateral, longitudinal, and vertical movements to support stability control and adaptive suspension systems. A range or performance fault means the sensor data is either implausible, stuck, or missing compared to the vehicle's other dynamic inputs.
The internal electronics of the sensor have failed, causing it to output an out-of-bounds or erratic signal that does not match actual vehicle movement.
Corroded, loose, or frayed wiring and connectors can disrupt the sensor's power, ground, or signal circuits, leading to an implausible reading.
If the sensor is physically mounted at the wrong angle or loses its software zero-point calibration, it will report inaccurate acceleration data.
A weak battery or failing alternator can drop the system voltage below the threshold required for the sensor to operate correctly, causing a range fault.
In rare cases, a fault within the chassis or powertrain control module may prevent it from properly interpreting the sensor signal.
The vehicle is generally safe to drive in normal conditions, but the stability and traction control systems will likely be disabled, increasing the risk of losing control in slippery situations.
Most vehicles require a zero-point calibration or relearn procedure using a professional diagnostic scan tool after the sensor is replaced, so the control module knows the correct baseline for vehicle orientation.
No, replacing the control module is almost never the correct fix for this code. The root cause is typically a failed sensor, a wiring issue, or a lost calibration, and a new module will not resolve these physical faults.
It measures the vehicle's movement across multiple directions—such as lateral acceleration during cornering and longitudinal acceleration during braking or accelerating—so the stability control system can intervene if the vehicle begins to slide or roll.