What Is an EPS Module and Why Does It Fail?

The EPS (Electric Power Steering) control module is the brain of your vehicle's power-assisted steering system. Unlike older hydraulic setups, modern EPS relies entirely on an electric motor — managed by this module — to provide steering assistance. When the module develops a fault, assistance drops or disappears altogether, the EPS warning light illuminates, and in some cases the vehicle enters a reduced-function mode or throws a cascade of CAN bus communication errors.

EPS modules fail for several well-documented reasons, and none of them automatically mean you need a new steering rack or a dealer-supplied replacement unit:

• MOSFET failure — The power transistors (MOSFETs) inside the module that drive the steering motor overheat over time. Once one fails, the module cuts assistance to protect the motor. This is component-level damage we repair at bench level.
• Dry solder joints — Thermal cycling from years of hot and cold starts causes solder joints on the main PCB to crack. Symptoms are intermittent — steering works fine when cold, fails when warm — a classic sign of this fault.
• Corrupted or degraded software — Some EPS modules carry flashable firmware. A failed update, a battery replacement during a software session, or a low-voltage event during driving can corrupt the module's operational parameters.
• Torque sensor degradation — The steering torque sensor communicates with the EPS module continuously. When the sensor degrades, the module logs a C0710 or equivalent and reduces or disables assist. The fault may sit in the sensor, the module, or the wiring between them.
• Capacitor failure — Electrolytic capacitors on the EPS PCB age and lose capacitance. Once below tolerance the module becomes unreliable, throwing intermittent faults and cutting steering assist unpredictably.

What Are the Symptoms of an EPS Fault?

EPS faults present in a consistent pattern across almost every make and model, making them relatively straightforward to identify even before you reach for a diagnostic tool.

• Heavy or stiff steering — full manual effort required, no power assist
• Intermittent loss of steering assist (works when cold, fails when warm — or vice versa)
• EPS, Power Steering, or Steering Fault warning light illuminated on the dashboard
• Pulling to one side under acceleration or braking
• Steering assist cutting out at low speed (town driving, car parks) where assist demand is highest
• Multiple simultaneous warning lights — ESP, stability control, ABS — caused by CAN bus communication loss from the EPS module
• Fault codes logged even after the warning light clears temporarily

If you're seeing several of these together, the EPS control module is almost certainly the source, not the rack itself.

Which Fault Codes Point to an EPS Module Problem?

The following P-codes and C-codes are most commonly associated with EPS module faults. A good diagnostic session should pull these before any physical work begins.

• C0710 — Steering Position Sensor Circuit Malfunction. One of the most common EPS codes across Ford, Vauxhall and GM platforms. Often indicates torque sensor input failure at the module.
• C0460 — Power Steering Control Circuit. Points directly to the EPS motor drive circuit within the module.
• U0131 — Lost Communication With Power Steering Control Module. The module is not responding on the CAN network — often caused by internal module failure or power supply fault to the unit.
• C0476 — Electric Power Steering Motor Control — Left/Right. Motor driver failure inside the module.
• B1342 (Ford-specific) — ECU Defective / Internal Control Module Fault. Logged in Ford EPS modules when the internal processor flags a self-test failure.
• P1580 (Vauxhall/Opel-specific) — Electric Power Steering Torque Sensor. Common on Astra, Corsa and Zafira EPS systems.
• C1511 / C1512 (Volkswagen Group) — EPS torque sensor plausibility fault. Seen on Golf, Polo, Seat Ibiza and Skoda Octavia EPS units.
• U3003 — Battery voltage out of range, sometimes logged alongside EPS faults when voltage spikes or dips have damaged the module's power supply circuit.

If you've pulled any of these codes, don't clear them and hope for the best. The underlying hardware fault won't resolve itself, and continued driving with compromised steering assist isn't worth the risk.

Which Vehicles Are Commonly Affected by EPS Module Faults?

EPS module failures are not brand-specific — they affect virtually every modern vehicle equipped with electric power steering. The makes and models we work on most frequently at The Vehicle Check include:

• Ford — Focus (Mk2, Mk3, Mk4), Fiesta (Mk6, Mk7, Mk8), Mondeo, Kuga, C-Max, Transit Connect
• Vauxhall / Opel — Astra (H, J, K), Corsa (D, E), Insignia, Zafira, Mokka
• Volkswagen Group — VW Golf (Mk5–Mk8), Polo, Passat; Seat Ibiza, Leon; Skoda Octavia, Fabia
• Renault / Nissan — Clio, Megane, Qashqai, Juke, Note — these platforms share EPS architecture and share failure modes
• BMW — 1 Series (E81/E87), 3 Series (E90/E91), Z4 — EPS column module faults common after 60,000 miles
• Toyota / Lexus — Yaris, Auris, Corolla, Prius — torque sensor and module faults well documented
• Honda — Civic (Mk8, Mk9), Jazz, CR-V — EPS ECU failures known across the platform

If your vehicle isn't listed, call us on 0203 489 2610 — if it has an EPS module, we can almost certainly help.

Why Does TVC's Repair Beat a Dealer Replacement Every Time?

Dealers sell replacement EPS modules. We repair your existing one. The difference in outcome for your wallet is significant.

A dealer-supplied replacement EPS module — before labour — typically costs £450–£1,100+ depending on platform. Add fitting labour at dealer rates (often 2–4 hours), steering angle sensor recalibration, and any associated diagnostic time, and a straightforward EPS fault can clear £1,400 at a main dealer. Independent garages are cheaper on labour but still face the same parts cost.

Our repair service addresses the root cause at component level. We don't swap the module — we fix what's wrong with yours. Your original unit, with your original data, goes back into your car. In the majority of cases, no additional coding is required. Turnaround is 24–48 hours from receipt, and every repair carries a full warranty.

The team at The Vehicle Check has been diagnosing and repairing automotive electronics across hundreds of vehicle platforms for over a decade. Our engineers work daily on EPS modules, alongside ECUs, ABS units, airbag modules, and body control modules — this isn't a side offering, it's core to what we do. That depth of hands-on experience across real faults on real vehicles is what separates a genuine repair from a guess.

For related electrical faults on your vehicle, our ABS module repair and ECU repair services follow the same principle — component-level repair, original unit returned, no unnecessary replacement.

How Does the Mail-In EPS Repair Process Work?

Sending your EPS module to us is straightforward, and most competent DIYers or local garages can remove the unit in under an hour.

1. Remove your EPS module — location varies by vehicle (column-mounted or rack-mounted). Your vehicle handbook or a quick model-specific search will show you access points. If you're unsure, call us on 0203 489 2610 and we'll talk you through it.
2. Package it securely — wrap in bubble wrap, box it up, include your name, contact number, vehicle registration and a brief description of the fault.
3. Post to us — The Vehicle Check, Office 13, 25 Mollison Avenue, Enfield, EN3 7LW. We recommend a tracked service.
4. We diagnose and repair — full bench testing, component-level fault finding, repair, firmware update if required, and final function test before despatch.
5. Returned within 24–48 hours of receipt — ready to refit. We'll contact you if a fault proves to be beyond economical repair before doing anything — no surprises, no hidden charges.

You can find full instructions and postage guidance on our mail-in repair page. Prefer to come to us? We're also available for drive-in appointments within approximately 60 miles of Enfield EN3.

Frequently Asked Questions — EPS Electric Power Steering Faults

Ready to Get Your Steering Back? Here's How to Reach Us

Whether your EPS light came on this morning or you've been driving with heavy steering for weeks, the sooner the module is diagnosed the better — these faults don't self-resolve, and driving without full steering assist is a safety issue worth taking seriously.

Get in touch via our contact page, call us directly on 0203 489 2610, or head straight to our mail-in repair page to get your module booked in. If you're dealing with related electrical faults at the same time — ABS, ECU or otherwise — our ABS module repair and ECU repair services are run through exactly the same process.

The Vehicle Check
Office 13, 25 Mollison Avenue, Enfield, EN3 7LW
Tel: 0203 489 2610
Nationwide mail-in | Drive-in within ~60 miles of Enfield EN3