The Ridgeline’s fluid requirements depend on the steering system of your model year. If your Ridgeline uses hydraulic power steering, it takes Honda Power Steering Fluid (PSF). If it uses electric power steering, there is no dedicated power steering fluid to add. Always verify with the owner's manual or the reservoir label for your exact specification.
Two generations, two systems
Honda Ridgeline models span hydraulic power steering (earlier generations) and electric power steering (modern generations). Knowing which system your truck has determines the correct fluid or maintenance approach.
Hydraulic power steering (2006–2014 Ridgelines)
For Ridgelines with a hydraulic steering system, use Honda Power Steering Fluid (PSF). Honda designs PSF specifically for its hydraulic PS pumps and gear assemblies. Avoid mixing with engine oil or other transmission fluids, and adhere to the reservoir's fill marks when checking levels.
What to use in a hydraulic PS system:
- Honda Power Steering Fluid (PSF)
- Only PSF; avoid substitutes unless specified by Honda
- Fill to the reservoir's proper level; check the cap or dipstick if equipped
Concluding note: If PSF is unavailable, contact a Honda dealer for an approved substitute rather than using generic ATF or other fluids.
Electric power steering (2017 onward Ridgelines)
Ridgelines built from roughly 2017 model year use electric power steering (EPAS). These systems do not use hydraulic power steering fluid, and there is typically no PSF reservoir to fill. Maintenance focuses on the steering motor, control modules, and related electronics. When diagnosing steering issues, follow the vehicle’s fault codes and battery health rather than fluid levels.
What to know about EPAS systems:
- No dedicated PSF reservoir on most models
- Do not add PSF or ATF to the steering system
- Follow dealer guidance for any repairs or system recalibration
Concluding note: For any uncertainty about your model year, consult the owner's manual or a Honda service technician to confirm the correct maintenance procedure.
How to tell which system your Ridgeline has
Identify by looking under the hood and checking the steering reservoir. A labeled power steering fluid reservoir indicates a hydraulic system; absence of such a reservoir or an EPAS indication suggests an electric system. If in doubt, refer to the owner's manual or contact a Honda dealership for confirmation.
- Look for a dedicated power steering fluid reservoir under the hood. If present and labeled, the system is hydraulic.
- Check the instrument cluster or owner's manual for references to EPAS.
- Consult a dealer or service technician to verify your model year's system.
Concluding note: Correctly identifying the system ensures you use the proper fluid type or service approach and avoids damage to the steering system.
Summary
The Honda Ridgeline’s fluid requirements depend on the steering system. Hydraulic PS models require Honda Power Steering Fluid (PSF). Electric power steering models do not use PSF and require no fluid addition. When in doubt, always consult the owner's manual or contact a Honda dealer to confirm the exact specification for your vehicle’s year and configuration.