EPS

📖 YOUCANIC Automotive Glossary

EPS (Electric Power Steering) uses an electric motor mounted on the steering column or rack to provide steering assist, replacing the traditional hydraulic power steering pump, fluid reservoir, hoses, and belt drive. The EPS control module adjusts assist level based on steering torque sensor input, vehicle speed, and engine RPM — heavy assist at low speeds for easy parking, light assist at highway speeds for stability. EPS is more fuel-efficient (no parasitic belt-driven pump load), lighter, and enables advanced features like lane keep assist and automated parking.

EPS failures cause the power steering warning light, heavy steering (loss of assist), intermittent assist, or pulling to one side. DTCs are manufacturer-specific EPS codes. Common causes include steering torque sensor faults, motor failures, and control module issues. After rack replacement, alignment, or steering column work, the YOUCANIC UCAN-II may be needed for steering angle sensor calibration and EPS system reset.