The "Steering Assist Reduced" message on your 2023 Chevrolet Equinox indicates the electric power steering system is operating in a limited capacity. This is a safety measure that maintains some steering function while alerting you to a problem requiring attention.
What the Warning Means
Unlike complete EPS failure, the reduced assist message indicates the system is still functioning but not at full capacity. The steering may feel heavier than normal but remains usable. The system has detected a fault that prevents normal operation but hasn't completely failed.
Common Triggers
Common causes include sensor malfunctions sending questionable data, motor temperature limits from heavy use, electrical supply issues affecting motor power, or software faults. The system limits assist as a precaution when it detects conditions that could cause unsafe operation.
Temperature-Related Issues
Electric power steering motors can overheat from continuous heavy use, particularly during prolonged parking lot maneuvering. The system reduces assist to prevent motor damage. Normal driving with less steering demand allows cooling and return to full function.
Electrical Supply Problems
Low battery voltage or charging system issues can trigger reduced assist. The EPS system requires substantial electrical power—if available power is limited, the system reduces demand to match supply. Check battery condition and charging system.
Sensor Calibration
Steering angle and torque sensors may need recalibration after certain service or if they develop drift. Incorrect sensor readings cause the system to operate conservatively, reducing assist to prevent potential issues from incorrect data.
Code C0545 Analysis
Code C0545 relates to steering control module or motor circuit issues. This code indicates the EPS system has detected an internal fault requiring diagnosis. The reduced assist mode allows continued operation while preventing potential issues from the detected fault.