Electric power steering systems fail in ways that range from a stiff wheel to a complete loss of information, and repair costs depend on what part broke and whether your car is still driveable

Electric power steering (EPS) uses a motor and computer to reduce the effort needed to turn the wheel. When it fails, you lose that information — the wheel becomes heavy and harder to turn, though you can still steer manually. The repair cost depends on whether the problem is the motor itself, the control module, the steering column sensor, or the wiring. A sensor replacement might run $300 to $600. A motor replacement typically costs $800 to $1,500. A control module can be $500 to $1,200. If the problem is wiring or a loose connector, you might pay $150 to $400 in labor alone.

The first step is a diagnostic scan. A shop will plug in a code reader to see what fault the system recorded — a bad motor, a sensor out of range, a communication error between components. This scan usually costs $100 to $150 and tells you exactly what failed. Without it, you are guessing, and guessing wrong means replacing a $1,000 part when the real problem was a $50 connector.

Key Takeaways

  • Electric power steering failure is usually a single component — motor, sensor, or control module — not the entire system, so diagnostic scanning before repair saves hundreds of dollars.
  • A stiff wheel that gradually got worse often points to a sensor or motor wearing out; a sudden loss of information with a warning light usually means an electrical fault or loose connection.
  • Some shops can reprogram or recalibrate the steering module instead of replacing it, which costs less but is not available for every failure mode.
  • If the wheel is stiff but the car still steers, you can drive carefully to a shop; if you lose information entirely, the car is still safe but requires more physical effort and should be inspected soon.

Why electric power steering fails and what the warning signs are

Electric power steering systems fail for a few common reasons. The motor brushes wear out over time, especially in cars with high mileage or frequent short trips. The steering angle sensor — which tells the motor how much information to provide — can drift out of calibration or fail entirely. The control module can develop a short or lose its programming. Wiring corrosion or a loose connector in the steering column is less common but happens, especially in cars exposed to salt or moisture.

The warning signs vary. A gradual stiffening of the wheel, where steering feels heavier over weeks or months, usually means the motor is losing power or the sensor is drifting. A sudden loss of information with a steering warning light on the dashboard points to an electrical fault — a sensor reading zero, a broken wire, or a module that has shut itself down. Some cars will show a "power steering fault" or "EPS malfunction" message. Others just go stiff with no message at all.

If the wheel becomes stiff but you can still turn it, the car is safe to drive slowly to a shop. If you lose information entirely and the wheel becomes very hard to turn, the car is still steerable but requires real physical effort — do not drive it on the highway, and do not ignore it. The longer you wait, the more likely a temporary electrical glitch becomes permanent damage.

Diagnostic scanning and what it tells you

A diagnostic scan is the only way to know what actually failed. The technician connects a code reader to the diagnostic port under the steering column or dashboard and pulls the fault codes stored in the EPS module. Common codes include C1A00 (motor circuit fault), C1A01 (sensor out of range), C1A04 (communication error), and C1A08 (module internal fault). Each code points to a specific part or circuit.

The scan also shows live data — the voltage the sensor is sending, the current the motor is drawing, the commands the module is sending. A technician who knows how to read this data can sometimes spot a problem that the code alone would miss. For example, a sensor might be reading 2.5 volts when it should read 2.0 volts; that is not quite bad enough to trigger a code, but it is drifting and will fail soon.

After the scan, a good shop will tell you what part failed and what the repair will cost. If they say "the whole steering system needs to be replaced," ask for the specific fault code and what component it points to. That is a red flag for either a shop that does not know how to diagnose EPS or one that is upselling you.

Motor replacement versus sensor or module repair

The most common repair is motor replacement. The motor bolts to the steering column and can be unbolted and swapped out in an hour or two. A new or remanufactured motor costs $400 to $900 depending on the car. Labor is usually $300 to $600. Some shops offer remanufactured motors, which are used motors that have been rebuilt and tested; these cost less than new but carry a shorter warranty, usually one year instead of three.

Sensor replacement is faster and cheaper. The steering angle sensor bolts to the steering column and takes 30 minutes to an hour to replace. The part itself costs $150 to $400, and labor is $100 to $200. After replacement, the sensor usually needs to be calibrated — the technician drives the car in a straight line while the module learns the sensor's zero point. This takes 10 to 15 minutes and is often included in the labor charge.

Control module replacement or reprogramming is less common but possible. If the module has lost its programming or developed a minor fault, some shops can reprogram it using a factory scan tool. This costs $200 to $400 and takes an hour. If the module is physically damaged — a burned-out circuit or a failed chip — it must be replaced, which costs $500 to $1,200 plus labor. A few shops can also send the module to a specialist for repair, which is cheaper than replacement but takes longer.

When to replace parts versus repair or recalibrate

Replacement is the standard path because it is fast and carries a warranty. A new motor or sensor comes with a parts warranty, usually one to three years depending on the shop. Repair or recalibration is worth considering if the part is expensive and the failure is minor — a sensor that is drifting but not completely dead, or a module that has lost calibration but is not damaged.

Ask your shop whether recalibration is an option before they order parts. Some shops have the tools and training to do it; others do not. If they do, they should be able to tell you the cost and how long it takes. If recalibration fails, you will still need to replace the part, so make sure the shop will credit the recalibration cost toward the replacement if that happens.

Remanufactured parts are a middle ground. They cost 30 to 50 percent less than new, but the warranty is shorter and the failure rate is slightly higher. If your car is older or you plan to keep it only a few more years, a remanufactured motor or module might make sense. If you plan to keep the car long-term, a new part with a longer warranty is worth the extra cost.

Labor costs and what affects the total bill

Labor time varies by car model and which part is being replaced. A motor replacement on a Honda or Toyota usually takes one to two hours. On a luxury car or a model with a complex steering column, it can take three to four hours. A sensor replacement is usually 30 minutes to an hour. A module replacement is similar — 30 minutes to an hour of labor.

The total bill also depends on whether other work is needed. If the diagnostic scan found a corroded connector, the shop might need to splice in new wiring, which adds labor. If the steering column has to come apart to reach the motor, that adds time. If the car needs a wheel alignment after the repair — which is rare but can happen if the steering angle sensor was very far out of calibration — that is another $100 to $200.

Shop rates vary widely. An independent shop might charge $80 to $120 per hour. A dealership typically charges $120 to $180 per hour. A big-box chain shop might charge $100 to $140 per hour. On a two-hour job, that difference adds up to $80 to $160. Get quotes from at least two shops before committing.

What to do if the repair is expensive and your car is old

If the repair is $1,500 or more and your car is 10 years old or older, it is worth asking whether the repair makes financial sense. A motor replacement on a car worth $5,000 is a reasonable investment. On a car worth $2,000, it might not be. Consider the car's overall condition, how long you plan to keep it, and whether other major systems are failing.

If you decide not to repair it, the car is still driveable. You will have a stiff wheel and will need to use more arm strength to turn, especially at low speeds or when parking. On the highway, steering is easier because the car is moving faster and the wheel is lighter. Many older cars never had power steering at all, so driving without EPS information is not dangerous — it is just less convenient.

If you do decide to repair it, ask the shop whether they can use a remanufactured part or whether recalibration is possible. Both options can cut the cost by 30 to 50 percent. Also ask whether the repair comes with a warranty and what it covers. A one-year parts warranty is standard; some shops offer longer.

Frequently Asked Questions

Can I drive the car if the power steering is stiff?

Yes. The car is safe to drive, but steering requires more physical effort, especially at low speeds and when parking. Avoid highway driving if the wheel is very stiff, and do not ignore the problem — a temporary electrical glitch can become permanent damage if left unrepaired.

How much does a diagnostic scan cost?

A diagnostic scan usually costs $100 to $150. Some shops waive the fee if you have the repair done there. It is worth paying for because it tells you exactly what failed and prevents you from replacing the wrong part.

What is the difference between a new motor and a remanufactured one?

A new motor is built from scratch and carries a longer warranty, usually three years. A remanufactured motor is a used motor that has been rebuilt, tested, and inspected; it costs 30 to 50 percent less but usually carries a one-year warranty and a slightly higher failure rate.

Do I need a wheel alignment after electric power steering repair?

Rarely. An alignment is needed only if the steering angle sensor was very far out of calibration before the repair. Your shop will tell you if one is needed after they finish the work.

What should I tell the shop when I call for a quote?

Tell them the car's year, make, and model; describe what you are experiencing (stiff wheel, warning light, sudden loss of information); and ask whether they can do a diagnostic scan and provide a quote for the repair. Ask about remanufactured parts and warranty options before you commit.