What is the electric power steering system warning light on a Toyota Highlander?
The electric power steering (EPS) warning light on a Toyota Highlander signals a fault in the steering assist system and can reduce or disable power assist. It should be treated as a diagnostic alert and addressed by a qualified technician as soon as possible.
What the warning light looks like on the dashboard
On most Highlander models, the EPS warning appears as a steering wheel icon with an exclamation mark or the letters "EPS" illuminated in amber or orange. In some situations, a red warning may flash if the fault is critical. If the light is accompanied by a message such as “Power Steering,” it indicates a problem specifically with the EPS system.
What it means for your Highlander
The EPS system uses an electric motor and sensors to provide steering assist, reducing the effort needed to steer. When the warning lights up, it means the system has detected a fault or is not receiving proper power or communication. Depending on the issue, you may still be able to steer, but assist can be reduced or temporarily unavailable, especially at lower speeds or during turning. Driving with a faulty EPS can affect handling and safety, so diagnostic attention is recommended.
Common causes
The following are among the most frequent reasons the EPS warning might appear on a Highlander. The list covers electrical supply, sensors, and control components that influence steering assist.
- Low or failing 12-volt electrical system voltage or battery condition
- Faulty steering angle sensor or torque sensor
- EPS motor or electronic control unit (ECU) fault
- Software calibration issues or after-work calibration needs following steering service
These issues can vary by model year and trim, and a precise diagnosis typically requires a scan with Toyota-specific diagnostic tools and a physical inspection of the steering system.
What to do now
If the EPS warning light appears while you are driving, take these prudent steps to maintain safety and reduce risk:
- Safely pull over when possible and assess the steering feel. If the wheel is heavy or unresponsive, avoid abrupt maneuvers and parked in a safe area.
- Check the 12-volt battery condition and charging system. A weak or failing battery can trigger EPS faults because the system relies on stable electrical power.
- Look for other warning indicators on the dashboard (battery, check engine, etc.) that might point to a broader electrical issue.
- If the light goes off after turning the ignition off and back on, monitor the vehicle closely. If it returns or the steering feels abnormal, arrange service promptly.
- Do not ignore the warning. Schedule a diagnostic check with a Toyota dealer or a qualified automotive shop as soon as feasible.
These steps are intended to reduce risk and guide you toward professional diagnosis; EPS faults can evolve and may affect steering assist reliability.
What to expect at the dealership
When you take the Highlander in for an EPS warning, technicians will typically perform a diagnostic interview and run tests to identify the root cause. Common procedures include reading DTCs (diagnostic trouble codes), inspecting the steering angle sensor and torque sensor, testing the EPS motor and its control module, and checking related wiring and seals. Depending on the findings, the repair may involve firmware updates, sensor replacement, wiring repair, or, in some cases, steering column or motor replacement. A professional inspection ensures the system is restored to proper function and recalibrated if needed.
Preventive tips to reduce risk of EPS issues
Regular maintenance and mindful use can help minimize EPS faults. The following practices can support system reliability:
- Keep the vehicle’s electrical system in good condition, including periodic battery health checks and charging system tests.
- Avoid aggressive steering maneuvers or turning the wheel fully while the vehicle is off or during startup, which can stress sensors and connectors.
- Adhere to scheduled service intervals and address any steering-related symptoms promptly (unusual noises, stiff steering, or warning lights).
- Have steering column work or suspension modifications performed by qualified technicians who can properly recalibrate relevant sensors.
Following these preventive steps can help sustain EPS performance and reduce unexpected fault conditions.
Summary
The EPS warning light on a Toyota Highlander indicates a fault in the electric steering assist system. It can lead to reduced or absent steering assist and should be diagnosed promptly by a qualified technician. If the light appears, assess safety, check the electrical system, and seek professional service to confirm the cause and perform necessary repairs or recalibration.
What does it mean when the electric power steering light comes on?
This light, often represented by a steering wheel icon or the letters “EPS” (Electric Power Steering), indicates that there is an issue with your steering system. If your power steering light turns on unexpectedly, it doesn't always mean immediate danger, but it's a sign that your car should be inspected promptly.
How expensive is it to fix electric power steering?
Electric power steering repair costs vary significantly depending on the specific issue, with minor fixes potentially costing $100–$300, while replacing major components like the EPS motor or full steering column can range from $300 to $1,550 or more. Factors like vehicle make and model, the specific part that needs replacement, and labor rates all influence the final price.
This video explains the cost of electric power steering repair and the factors that influence it: 1mTalkingTechTrendsYouTube · Jun 7, 2025
Cost breakdown by repair type
- Minor fixes: Simple issues like a sensor or small leak can sometimes be fixed for $100–$300.
- EPS Motor: If the electronic motor fails, replacement costs typically range from $300 to $800.
- Full Steering Column: Replacing the entire steering column is one of the more expensive repairs, with costs often falling between $530 and $1,550.
- Steering Rack: Replacing the steering rack can cost between $710 and $2,420 for most vehicles.
- Diagnostic Fees: Some shops charge a diagnostic fee, which can be around $200, to determine the exact problem.
Factors that affect the cost
- Vehicle Make and Model: The cost of parts varies significantly based on the vehicle. For example, dealer parts can be more expensive than aftermarket ones.
- Labor Costs: Labor can account for a significant portion of the total cost, especially for complex repairs like a steering column or rack replacement.
- Shop Location: Labor rates vary by geographic location, so getting quotes from different shops can be beneficial.
- Part vs. Labor: In many cases, labor costs can be higher than the price of the part itself.
- DIY vs. Professional: If you have the mechanical skill, doing the work yourself can save significant money on labor. However, professional help is recommended for more complex issues, and some repairs require specialized equipment or programming.
What is the electric power steering warning on a Toyota Highlander?
The EPS, or Electric Power Steering, Warning Light indicates a malfunction in the Electric Power Steering system. It is recommended that you have your vehicle inspected by a Toyota dealer immediately.
Can I drive with the electric power steering light on?
If you're driving along and you notice your power steering light come on – which looks like a steering wheel with an exclamation mark next to it – you should park your car in a safe place as soon as you can, taking extra care as you'll be struggling a little with much heavier steering.
