Damaged or corroded wiring or connector at the multi-axis acceleration sensor, often due to water intrusion or physical damage.; Faulty multi-axis acceleration sensor itself, which can fail internally and stop transmitting data.; Open or short circuit in the CAN bus wiring between the sensor and the stability control module.; Poor ground connection for the sensor or the module it communicates with, causing intermittent communication.; Failed stability control module (less common) that cannot process the sensor data.; Software glitch or corrupted configuration in the stability control module requiring reprogramming.; Aftermarket accessories or improper electrical repairs that disturb the CAN bus wiring.

DTC codes / U01xx · Lost communication with a control module / U0125

U0125Lost Communication With Multi-axis Acceleration Sensor Module

U0125 is a network communication code indicating that the module responsible for stability and traction control has stopped receiving data from the multi-axis acceleration sensor over the vehicle's Controller Area Network (CAN) bus. The computer has detected a loss of the periodic signal that the sensor normally broadcasts, which is essential for detecting yaw, pitch, and roll during cornering or slippery conditions.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaLost communication with a control module

Symptoms you may notice

Illumination of the stability control (ESC/ESP) and traction control warning lights, often accompanied by the ABS light.
The stability control system may be disabled, reducing the vehicle's ability to prevent skids or loss of control.
A stored U0125 code in the stability control module or other modules on the network.
Often no symptoms besides the warning light, as the vehicle remains driveable in most conditions.
In some cases, the vehicle may enter a limp mode or limit power if the stability system is considered critical.
Intermittent warning light activation, especially over bumps or during temperature changes, indicating a loose connection.

Common causes, most likely first

Damaged or corroded wiring or connector at the multi-axis acceleration sensor, often due to water intrusion or physical damage.
Faulty multi-axis acceleration sensor itself, which can fail internally and stop transmitting data.
Open or short circuit in the CAN bus wiring between the sensor and the stability control module.
Poor ground connection for the sensor or the module it communicates with, causing intermittent communication.
Failed stability control module (less common) that cannot process the sensor data.
Software glitch or corrupted configuration in the stability control module requiring reprogramming.
Aftermarket accessories or improper electrical repairs that disturb the CAN bus wiring.

How to diagnose and fix it

Use an OBD-II scanner to confirm U0125 is current and check for other communication codes that might indicate a broader network issue.
Visually inspect the multi-axis acceleration sensor and its connector for corrosion, water damage, or loose pins, and clean or repair as needed.
Check the sensor's power and ground circuits with a multimeter to ensure proper voltage and continuity.
Perform a wiggle test on the wiring harness while monitoring live data for the sensor signal to detect intermittent faults.
If wiring and power are good, test the sensor's CAN bus communication with an oscilloscope or by substituting a known-good sensor.
Reprogram or replace the stability control module if the sensor is functioning but communication is still lost.
Clear the code and perform a road test to verify the repair, ensuring the stability control system operates correctly.

Common Misdiagnosis Traps for U0125

A weak or failing battery or charging system can cause voltage drops that disrupt CAN bus communication, setting U0125 without any fault in the sensor itself.
The multi-axis acceleration sensor is sometimes integrated into the stability control module on certain vehicles, so a U0125 may actually indicate an internal module fault rather than a separate sensor issue.
Water intrusion into the sensor connector or module housing is a frequent cause, especially if the sensor is mounted low in the vehicle or under the carpet.
Aftermarket electronic accessories, such as dash cams or alarm systems, improperly wired into the CAN bus can interfere with communication and trigger U0125.
A U0125 code can be stored historically due to a low voltage event, such as jump-starting, and may not indicate a current fault if the light is off.

Can I keep driving with U0125?

You can generally continue driving with U0125, but the stability control system may be disabled, reducing safety in slippery conditions or emergency maneuvers. Avoid aggressive driving and have the fault diagnosed promptly to restore full stability control function.

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.