Can you still drive with a power steering assist fault?
You may still be able to drive, but with reduced steering assist and added risk. If a power steering fault warning is active, plan to reach a safe location and seek professional diagnosis as soon as possible.
Power steering systems come in hydraulic and electric forms. A fault can illuminate a warning light (often labeled Steering, Power Steering, or EPS) and may be triggered by fluid leaks or levels, electrical or sensor failures, worn belts, battery or charging problems, or software/communications issues. The safety and drivability depend on the exact fault and the vehicle’s design.
What power steering is and what can trigger a fault
Understanding the basics helps explain why you might still drive and how much help you’ll have steering-wise. Below are common causes that trigger a fault warning.
- Electrical power steering (EPS) faults caused by sensor, wiring, or control module failures
- Battery or charging issues affecting the EPS system’s electrical supply
- Steering angle or torque sensor failures in electric systems
- Hydraulic power steering problems, such as low fluid level, leaks, or a worn pump
- Drive belt wear or failure that powers hydraulic pumps
- Software/ECU faults or faulty CAN bus communications
- Steering rack or column mechanical wear or damage
- Aftermarket modifications or incompatible components interfering with the system
Understanding these triggers helps drivers gauge the immediate risk and prioritize a repair. A warning light doesn’t always mean total loss of steering, but it often signals an urgent fault that requires service.
Impact on drivability and safety considerations
The extent of steering assist variation depends on the fault and vehicle design. Some cars may retain partial assist or switch to a degraded “limp” mode, while others may lose assist entirely. In all cases, heavy steering, especially at low speeds, increases the risk of losing control during turning or parking maneuvers.
Because steering is fundamental to safe operation, it’s prudent to treat any steering fault seriously and arrange professional inspection as soon as possible.
Is it safe to drive with the fault?
Depends on the severity and the vehicle. Some drivers can cope with lighter or intermittent issues, but many faults reduce maneuverability and increase the chance of an accident. The safest approach is to minimize driving distance and seek service promptly.
General guidance for the moment a fault is noticed:
- Expect heavier steering and plan your route with extra time and caution
- Avoid high-speed driving, aggressive maneuvers, or parking in tight spaces
- If the steering feels unusually heavy or impractical, stop safely and call for roadside assistance
- Do not ignore multiple warning lights or inconsistent system behavior
Driving with a suspected power steering fault should be restricted to reaching a safe location or a service center. Prolonged operation without proper repair can increase the risk of a crash, particularly in urban traffic or situations requiring swift steering input.
What to do if you notice a steering fault
Acting promptly can reduce risk and prevent further damage. The steps below are meant to guide you toward safe, professional repair.
- Safely pull over and switch on hazard lights if you can do so without creating danger
- Check the dashboard warnings and note any codes or messages for the technician
- If it’s a hydraulic system and you’re low on fluid, avoid driving to prevent further damage; do not overfill
- Inspect visible components for leaks, cracks, or worn belts if the situation is safe to inspect
- Contact roadside assistance or a tow to a qualified repair shop; avoid attempting to “fix” the electrical or hydraulic system yourself
Professional diagnosis is essential because the exact fault determines whether you can safely drive to a service center or if towing is required. Resetting warnings or improvising repairs can conceal a dangerous condition.
Diagnostic and repair priorities for technicians
When a vehicle arrives at a shop, technicians typically focus on confirming the fault with proper tools and then addressing root causes. Common steps include:
- Reading fault codes with an appropriate scan tool and verifying EPS/ECU logs
- Testing the electrical supply, including battery and charging system
- Inspecting power steering fluid levels and looking for leaks (for hydraulic systems) and belt condition
- Evaluating steering components (rack, pinion, column) and sensor circuits for wear or damage
- Assessing software updates or calibration requirements for the steering assist system
Depending on the fault, repairs may range from a simple fluid top-up or fuse replacement to replacement of pumps, sensors, or control modules. In some cases, software updates or recalibration are sufficient to restore proper function.
Maintenance and prevention tips
Keeping the steering system healthy reduces the likelihood of faults and helps you respond quickly if one occurs.
- Follow the manufacturer’s service intervals for power steering components and electrical systems
- Regularly check for fluid level and leaks in hydraulic systems; never ignore a sudden drop in fluid
- Have the battery and charging system tested periodically; EPS relies on stable power
- Seek prompt diagnostic attention for any steering warning lights or unusual steering feel
Addressing steering issues early can prevent costly damage and maintain safe handling characteristics.
Summary
A power steering assist fault does not always mean you cannot drive, but it often results in heavier steering and a reduced safety margin. The safest course is to limit driving, assess the situation, and have the system inspected by a qualified technician as soon as possible. Understanding the fault’s cause helps determine whether the vehicle can safely reach a repair facility or requires towing, and addressing it promptly protects you, your passengers, and others on the road.
How much does it cost to fix the power steering assist fault?
Average Cost to Repair or Replace Electric Power Steering
On average, repairs range from $500 to $2,000, depending on your vehicle and labor rates. Luxury models or vehicles with advanced driver-assist systems fall on the higher end of the range.
Is it safe to drive with an electric power steering light on?
We strongly advise against driving with a power steering warning light, as your car's handling and safety could be compromised.
How long can I drive with the power steering light on?
You should not drive for long with the power steering light on; pull over to a safe location as soon as possible. Continuing to drive can be difficult and dangerous because steering will be much harder, especially at low speeds, and a complete system failure could cause the drive belt to break, disabling other critical components like the alternator and water pump. The safest option is to have a qualified mechanic diagnose and repair the problem before driving again.
Risks of driving with the power steering light on
- Increased steering effort: Without power assistance, you will have to use significantly more force to turn the steering wheel. This can be especially challenging and potentially dangerous when parking or making low-speed turns.
- Sudden system failure: If the issue is caused by a failing pump or lack of fluid, the system could fail completely.
- Serpentine belt damage: A seized power steering pump can cause the accessory belt to break. This belt also drives other critical components, such as the alternator (which charges the battery) and the water pump (which cools the engine).
- Component damage: Driving with a failing hydraulic system can cause further damage to the pump and other parts.
What to do instead of driving
- Pull over safely: Find a safe spot to pull over immediately. If you must continue to a nearby location, drive very slowly and with extreme caution.
- Check the fluid (if applicable): If you have a hydraulic system, check the power steering fluid level. If it's low, add the correct fluid, and the light may go off. However, this is often a temporary fix if there is a leak.
- Call a tow truck: To prevent further damage and for your own safety, it is best to have the vehicle towed to a mechanic for a proper diagnosis and repair.
What will happen if the power assisted steering system fails?
If a power-assisted steering system fails, the steering wheel will become very heavy and difficult to turn, especially at low speeds, because the power assist is lost and the driver must rely on manual strength. This can make maneuvering the vehicle dangerous, particularly in emergency situations, and can lead to an accident due to the increased effort required to turn or a delayed steering response.
Immediate effects
- Heavy steering: The most immediate impact is that the steering wheel will feel much heavier, similar to driving an older, non-powered car.
- Difficulty maneuvering: Parking and making turns at low speeds will require significant physical effort and can be challenging.
- Increased accident risk: The difficulty in steering can be dangerous, especially in emergencies where quick and precise maneuvers are needed.
This video explains the symptoms of an electric power steering failure: 47sAuto V Fix YouTube · Apr 4, 2023
Other potential issues
- Delayed steering response: In some electric power steering systems, a partial failure can cause a delay between turning the wheel and the vehicle's response.
- Vehicle pulling to one side: A failure in the system, particularly with issues like a faulty torque sensor, could cause the car to pull to one side, making it difficult to keep it in a straight line.
- Warning lights: A dashboard warning light may illuminate to indicate a problem with the power steering system.
What to do
- Reduce speed and pull over safely: If you experience a power steering failure while driving, safely reduce your speed and pull over to the side of the road.
- Do not continue driving if difficult: If you have to exert a lot of force to turn the wheel, it is not safe to continue driving. Call a tow truck to avoid further strain on the steering system and to prevent potential loss of control.
