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U0125 Code - Lost Communication with Multi-Axis Acceleration Sensor Module

Quick Answer

The U0125 diagnostic trouble code (DTC) indicates that the vehicle's engine control module (ECM) has lost communication with the Multi-Axis Acceleration Sensor Module. Common causes include Faulty Multi-Axis Acceleration Sensor Module, Wiring or connection issues between the sensor module and ECM, Corrosion or damage to the sensor module connectors. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
U0125 indicates Lost Communication with Multi-Axis Acceleration Sensor Module.
Common causes
Common causes include Faulty Multi-Axis Acceleration Sensor Module, Wiring or connection issues between the sensor module and ECM, Corrosion or damage to the sensor module connectors.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 06, 2024
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Code U0125 Description

The U0125 diagnostic trouble code (DTC) indicates that the vehicle's engine control module (ECM) has lost communication with the Multi-Axis Acceleration Sensor Module. This module is responsible for measuring the vehicle's acceleration in multiple directions and relaying this information to the ECM for various functions, including stability control systems, traction control, and possibly even airbag deployment.

OBDII Code U0125 - Lost Communication with Multi-Axis Acceleration Sensor Module
U0125 Code - Lost Communication with Multi-Axis Acceleration Sensor Module

Common Causes of U0125

  1. Faulty Multi-Axis Acceleration Sensor Module
  2. Wiring or connection issues between the sensor module and ECM
  3. Corrosion or damage to the sensor module connectors
  4. ECM software issue or malfunction
  5. Electrical interference or signal disruption

Symptoms of U0125

  1. Illuminated traction control or stability control warning lights on the dashboard
  2. Loss of traction control or stability control functionality
  3. Erratic or unpredictable handling, especially in slippery conditions
  4. Inoperative airbag system
  5. Difficulty accelerating smoothly

How to Fix U0125

  1. Begin by conducting a thorough visual inspection of the sensor module and its wiring harness for any visible damage or corrosion.
  2. Use a diagnostic scan tool to retrieve the specific trouble code and further diagnose the issue.
  3. Test the sensor module's communication with the ECM using a multimeter to check for continuity and proper voltage.
  4. If necessary, replace the Multi-Axis Acceleration Sensor Module and reprogram it to the vehicle's ECM.
  5. Clear the trouble code from the ECM's memory and perform a test drive to ensure the issue has been resolved.

Cost to Fix U0125

The cost of repairing a U0125 code can vary depending on the specific cause of the issue and the vehicle's make and model. In general, replacing the Multi-Axis Acceleration Sensor Module and reprogramming it can range from $200 to $500, including parts and labor. However, additional diagnostic time and any necessary repairs to wiring or connectors could increase the total cost. It is recommended to consult with a qualified mechanic or dealership to obtain a more accurate estimate based on your vehicle's specific needs.

What does this mean?

Tech Notes for U0125

When there are problems with the way different systems in a vehicle communicate with each other using a technology called Controller Area Network (CAN) communication, Diagnostic Trouble Codes (DTC) are displayed. These codes can be caused by issues with the main bus or branch of the communication network, or with the Electronic Control Units (ECUs) and sensors that make up the different systems. If you see code for both the CAN communication problems and internal or power source problems at the same time, you should focus on fixing the internal or power source problems first.

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Code U0125 Information for Specific Makes

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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