U2842 – Lost Communication with the Steering Angle Sensor.
The ODBII code U2842 indicates a loss of communication with the steering angle sensor, which may affect the vehicle’s stability control and steering functions.
The severity of ODBII code U2842 is generally considered moderate.
Common Causes For: U2841 U2841: Vehicle Communication Bus Malfunction
- Faulty steering angle sensor
- Damaged wiring or connectors
- Poor electrical connections
- Malfunctioning power steering control module
- Software issues or calibration errors
- Low battery voltage or electrical system issues
- Interference from aftermarket devices or modifications
Common misdiagnosis for U2842 Lost Communication with the Steering Angle Sensor.
- Faulty steering angle sensor
- Wiring issues or damaged connectors
- Faulty steering column module
- Malfunctioning electronic stability control (ESC) system
- Issues with the vehicle’s body control module (BCM)
- Problems with the power steering system
- Faulty ABS module
- Incorrectly calibrated steering angle sensor
Common Troubleshooting Steps
When dealing with the OBD-II code U2842, 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 Additional Codes: Use an OBD-II scanner to check for any other related trouble codes. This can provide more context and help identify if there are other issues present.
- 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 pushed back.
- 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. Check for proper voltage and signal output.
- **Calibration: Some vehicles require the steering angle sensor to be calibrated after installation or repair. Refer to the vehicle’s service manual for calibration procedures.
- Check Power and Ground: Verify that the steering angle sensor is receiving the correct voltage and has a good ground connection. Use a multimeter to check for power 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 wiring or other modules on the bus.
- Look for shorts, opens, or high resistance in the CAN lines.
- Check for Interference: Ensure that there are no aftermarket devices or modifications that could be interfering with the communication between the steering angle sensor and the vehicle’s control modules.
- Perform a System Reset: Clear the trouble codes using the OBD-II scanner and see if the code returns after a test drive. Sometimes, a reset can resolve temporary communication issues.
- Inspect Related Modules: If the problem persists, check other related modules (like the ABS module or the power steering control module) for faults or communication issues.
- Consult Technical Service Bulletins (TSBs): Look for any TSBs related to the steering angle sensor or communication issues for your specific vehicle make and model. Manufacturers may have known fixes or updates.
- Seek Professional Help: If you are unable to resolve the issue after these steps, it may be necessary to consult a professional mechanic or technician who has experience with your vehicle’s specific systems.Conclusion By following these troubleshooting steps, you can systematically identify and address the cause of the U2842 code. Always refer to the vehicle’s service manual for specific procedures and specifications related to your vehicle.