U2599 – Lost Communication with the Steering Angle Sensor.

The ODBII code U2599 indicates a loss of communication with the steering angle sensor, which may affect the vehicle’s stability control and steering systems.

The severity of ODBII code U2599 is generally considered moderate.

Common Causes For: U2598 Lost Communication with the Steering Angle Sensor.

• Faulty steering angle sensor
• Damaged wiring or connectors
• Poor electrical connections
• Malfunctioning vehicle control module (VCM)
• Software issues or bugs
• Low battery voltage
• Corrosion in connectors or terminals
• Interference from aftermarket devices or modifications

Common misdiagnosis for U2599 Lost Communication with the Steering Angle Sensor.

• Faulty steering angle sensor
• Wiring issues or damaged connectors
• Faulty steering column module
• Malfunctioning ABS module
• Power steering system issues
• Faulty body control module (BCM)
• Incorrectly calibrated steering angle sensor
• Software or firmware issues in the vehicle’s control modules

Common Troubleshooting Steps

When dealing with OBD-II code U2599, which indicates “Lost Communication with the Steering Angle Sensor,” there are several common troubleshooting steps you can take 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 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 bus, check for any issues with the CAN bus wiring or other modules on the bus.
• Look for shorts, opens, or high resistance in the CAN bus wiring.
• 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 may resolve communication issues. Check with the manufacturer for any available updates.
• Inspect Related Components: Check other components that may affect the steering angle sensor, such as the steering column, steering rack, or any related sensors (e.g., yaw rate sensor).
• 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 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.1
• Professional Diagnosis: If the issue persists after performing these steps, consider seeking help from a professional mechanic or dealership, as they may have specialized tools and knowledge to diagnose the problem further. By following these steps, you should be able to identify the cause of the U2599 code and take appropriate action to resolve the communication issue with the steering angle sensor.