U2591 – Lost Communication with the Steering Angle Sensor.

The ODBII code U2591 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 U2591 is generally considered moderate to high.

Common Causes For: U2590 U2590: Control Module Communication Bus Fault

• Faulty steering angle sensor
• Damaged wiring or connectors
• Poor electrical connections
• Malfunctioning power supply to the sensor
• Software issues or calibration errors
• Faulty vehicle control module (VCM)
• Interference from other electronic components

Common misdiagnosis for U2591 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 ABS Module
• Software Issues or Corrupted Firmware
• Battery or Charging System Problems

Common Troubleshooting Steps

When dealing with OBD-II code U2591, 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. Other codes may provide more context or indicate related issues.
• 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 resistance values as specified in the vehicle’s service manual.
• **Calibration: Some vehicles require the steering angle sensor to be calibrated after installation or repair. Check if calibration is necessary.
• Check Power and Ground: Verify that the steering angle sensor is receiving the correct voltage and that the ground connection is solid. 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 issues with the CAN bus wiring. Look for shorts, opens, or other faults in the wiring.
• Use a scan tool to monitor the CAN bus for communication errors.
• 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.
• Test the Vehicle’s Control Modules: If the steering angle sensor appears to be functioning correctly, the issue may lie with the vehicle’s control modules (e.g., ABS, ESC). Check for updates or faults in these modules.
• Clear Codes and Test Drive: After performing the above checks and repairs, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code returns.
• Consult Service Manual: Refer to the vehicle’s service manual for specific diagnostic procedures and specifications related to the steering angle sensor and its communication.
• Seek Professional Help: If the issue persists after performing these steps, it may be necessary to consult a professional mechanic or technician who has access to advanced diagnostic tools and equipment. By following these steps, you should be able to identify and resolve the issue related to the U2591 code.