U2137 – Lost Communication with the Steering Angle Sensor.
The ODBII code U2137 indicates that there is a loss of communication between the vehicle’s control module and the steering angle sensor, which may affect systems that rely on steering input for operation.
The severity of ODBII code U2137 is generally considered moderate.
Common Causes For: U2136 Lost Communication with the Steering Angle Sensor Module.
- Faulty steering angle sensor
- Damaged wiring or connectors
- Poor electrical connections
- Malfunctioning vehicle control module (VCM)
- Software issues or outdated firmware
- Corrosion in connectors or terminals
- Interference from other electronic components
- Low battery voltage or power supply issues
Common misdiagnosis for U2137 Lost Communication with the Steering Angle Sensor.
- Faulty Steering Angle Sensor
- Wiring Issues or Short Circuits
- Faulty Body Control Module (BCM)
- Faulty Electronic Power Steering (EPS) Module
- Incorrectly Calibrated Steering Angle Sensor
- Faulty Instrument Cluster
- Issues with the CAN Bus Communication
- Battery or Power Supply Problems
Common Troubleshooting Steps
When dealing with the OBD-II code U2137, which indicates “Lost Communication with the Steering Angle Sensor,” there are several common troubleshooting steps you can follow to diagnose and potentially resolve the issue. Here’s a structured approach:
- Check for Other Codes: Use an OBD-II scanner to check for any additional trouble codes. Sometimes, multiple codes can provide more context about the issue.
- Inspect Wiring and Connectors: **Visual Inspection: Check the wiring harness and connectors associated with the steering angle sensor for any signs of damage, corrosion, or loose connections.
- **Connector Pins: Ensure that the pins in the connectors are not bent, corroded, or damaged.
- Test the Steering Angle Sensor: **Sensor Functionality: If possible, test the steering angle sensor using a multimeter or scan tool to ensure it is functioning correctly.
- **Resistance and Voltage: Measure the resistance and voltage at the sensor to ensure it is within the manufacturer’s specifications.
- Check Power and Ground: Verify that the steering angle sensor is receiving the correct power supply and ground. Use a multimeter to check for voltage at the sensor connector.
- Inspect the CAN Bus: Since the steering angle sensor communicates over the CAN (Controller Area Network) bus, check for any issues with the CAN bus wiring.
- Look for shorts, opens, or high resistance in the CAN bus lines.
- Scan Tool Data: Use a scan tool to monitor live data from the steering angle sensor. Check if the sensor is providing data when the steering wheel is turned.
- Look for any irregularities in the data that may indicate a malfunction.
- Check for Software Updates: Sometimes, a software update for the vehicle’s ECU (Engine Control Unit) or other modules can resolve communication issues. Check with the manufacturer for any available updates.
- Inspect Related Modules: If the steering angle sensor is part of a larger system (like stability control or power steering), check the related modules for faults or communication issues.
- Clear Codes and Test Drive: After performing the above checks and repairs, clear the trouble codes and take the vehicle for a test drive to see if the code reappears.
- Consult Service Manual: If the issue persists, consult the vehicle’s service manual for specific diagnostic procedures related to the steering angle sensor and its communication protocols.1
- Professional Diagnosis: If you are unable to resolve the issue, consider seeking help from a professional mechanic or dealership, as they may have specialized tools and knowledge to diagnose complex communication issues. By following these steps, you should be able to identify the cause of the U2137 code and take appropriate action to resolve it.