Proace Electric Power Steering Fault Codes: Complete Troubleshooting & Clearing Guide

When your Proace Electric displays power steering fault codes, it can be both concerning and frustrating. The Electric Power Steering (EPS) system is a critical component that enhances driving safety and comfort, but like all sophisticated vehicle systems, it can occasionally experience issues that trigger fault codes. Understanding these codes and knowing how to address them properly can save you time, money, and unnecessary stress.

As specialists with over five decades of experience in automotive components, particularly steering systems, we've compiled this comprehensive guide to help Proace Electric owners understand, diagnose, and clear power steering fault codes. Whether you're experiencing steering resistance, unusual noises, or warning lights on your dashboard, this article will walk you through the essential steps to identify and resolve these issues.

From explaining the intricacies of the Proace Electric's power steering system to providing detailed instructions for clearing fault codes, our guide combines technical expertise with practical solutions. Let's dive into the world of electric power steering systems and empower you with the knowledge to keep your Proace Electric steering smoothly.

Understanding Proace Electric Power Steering Systems

The Proace Electric utilizes an advanced Electric Power Steering (EPS) system that represents a significant evolution from traditional hydraulic systems. Unlike hydraulic power steering that relies on a pump driven by the engine, the EPS system employs an electric motor that provides assistance directly to the steering mechanism. This design offers numerous advantages, including improved fuel efficiency, reduced maintenance, and more precise steering control.

At the heart of the Proace Electric's steering system is a sophisticated electronic control unit (ECU) that continuously monitors various parameters such as vehicle speed, steering angle, and driver input torque. Based on these inputs, the ECU determines the appropriate level of steering assistance required for optimal handling and comfort. The system also includes a torque sensor mounted on the steering column, which measures the force applied by the driver to the steering wheel.

The electric steering rack in the Proace Electric is engineered to provide variable assistance—offering more support at lower speeds for easy maneuvering and less assistance at higher speeds for improved stability and road feel. This intelligent adaptation enhances both driving comfort and safety across different driving conditions.

When functioning correctly, the EPS system should operate smoothly and transparently, with drivers experiencing consistent and appropriate steering resistance. However, various factors can lead to system malfunctions, triggering fault codes and potentially affecting steering performance.

Common Fault Codes in Proace Electric Power Steering

The Proace Electric's onboard diagnostic system uses standardized fault codes to indicate specific issues with the power steering system. These codes can be retrieved using an OBD-II scanner and typically begin with "C" (for chassis-related issues) or "U" (for network communication problems). Here are the most common fault codes associated with the Proace Electric's power steering system:

C1511 - Steering Torque Sensor Circuit Malfunction

This code indicates a problem with the torque sensor that measures the driver's steering input. It may result from damaged wiring, connector issues, or sensor failure. When this code appears, drivers typically experience inconsistent steering assistance or complete loss of power assist.

C1512 - Steering Torque Sensor Signal Range/Performance

This fault suggests that the torque sensor is producing readings outside its expected parameters. The issue might stem from sensor calibration problems or physical damage to the sensor. Drivers may notice erratic steering assistance that varies unpredictably.

C1513 - Steering Motor Circuit Malfunction

This code points to issues with the electric motor that provides steering assistance. Common causes include damaged motor windings, faulty power connections, or motor controller problems. The symptom is typically a complete loss of power steering assistance, resulting in heavy steering.

C1514 - EPS Control Module Failure

This indicates a problem with the Electronic Power Steering control module itself. It might result from internal electronic failures, software corruption, or power supply issues. Symptoms can range from intermittent steering assistance to complete system shutdown.

U0126 - Lost Communication With Steering Angle Sensor Module

This network-related code suggests communication problems between the EPS module and the steering angle sensor. Causes may include damaged wiring, connector problems, or module failures. This typically results in limited steering assistance or activation of fail-safe mode.

U0128 - Lost Communication With Electric Power Steering Module

This indicates communication issues between the vehicle's main computer and the EPS module. Wiring problems, connector issues, or module failures could be the cause. The system may enter a restricted operation mode with limited or no power assistance.

Understanding these fault codes is the first step toward diagnosing and resolving power steering issues in your Proace Electric. Each code points to specific components or systems that require attention, allowing for more targeted troubleshooting and repairs.

Diagnosing Power Steering Issues

Before attempting to clear fault codes, it's essential to properly diagnose the underlying issue to ensure it's resolved correctly. Here's a systematic approach to diagnosing power steering problems in your Proace Electric:

Recognize the Warning Signs

Pay attention to symptoms that might indicate power steering problems. These can include the EPS warning light illuminating on the dashboard, increased steering effort, inconsistent steering assistance, unusual noises when turning the steering wheel, steering wheel vibration, or the vehicle pulling to one side. Early detection of these warning signs can prevent more serious damage to the system.

Use an OBD-II Scanner

A quality OBD-II scanner is essential for retrieving specific fault codes from your Proace Electric. For power steering issues, ensure your scanner supports chassis codes (C-codes) and network codes (U-codes). Connect the scanner to the OBD-II port (usually located under the dashboard near the driver's position) and follow the manufacturer's instructions to retrieve the codes.

Check Battery and Electrical System

As an electric vehicle, the Proace Electric's power steering system is particularly sensitive to voltage issues. Verify that the vehicle's 12V battery has sufficient charge and that all connections are clean and secure. Low voltage can trigger false fault codes or cause intermittent steering assistance problems.

Inspect Physical Components

Conduct a visual inspection of accessible steering components. Check for damaged wiring, loose connectors, signs of fluid leaks (though EPS systems don't use hydraulic fluid, other fluids could indicate separate issues), or physical damage to the steering rack. Also inspect the steering column for any signs of damage or unusual play.

Test Drive Assessment

If safe to do so, conduct a test drive to evaluate the power steering performance under various conditions. Note when issues occur—whether during low-speed maneuvering, highway driving, or specific steering movements. This information can help narrow down potential causes and verify if the problem is consistent or intermittent.

Review Vehicle History

Consider recent events that might relate to the power steering issues. Recent battery disconnection, electrical work, collisions (even minor ones), or software updates could potentially affect the EPS system. Understanding the timeline can provide valuable clues about the root cause.

By following this diagnostic approach, you can gain a clearer understanding of the specific power steering issue affecting your Proace Electric. This information is crucial for determining whether the fault codes can be safely cleared and the system reset, or if professional repairs are needed before proceeding.

Step-by-Step Guide to Clearing Fault Codes

Once you've diagnosed the underlying issue and made any necessary repairs, you can proceed with clearing the fault codes from your Proace Electric's power steering system. Follow these steps carefully to ensure the process is completed correctly:

Preparation

Before beginning, ensure your vehicle is parked on a level surface with the parking brake engaged. The ignition should be turned off, and all accessories powered down. Have your OBD-II scanner ready and ensure it's compatible with the Proace Electric's systems. If possible, connect a battery maintainer to prevent voltage drops during the procedure, as low voltage can interfere with the clearing process.

Accessing the Diagnostic System

Connect your OBD-II scanner to the vehicle's diagnostic port. Turn the ignition to the "ON" position without starting the engine (for the Proace Electric, this typically means pressing the power button without pressing the brake pedal). Wait for your scanner to establish communication with the vehicle's onboard systems.

Navigate to EPS System

Using your scanner's interface, navigate to the vehicle systems menu and select the Electric Power Steering (EPS) system or Chassis systems. The exact menu options may vary depending on your scanner model. Once in the EPS system, you should be able to view current fault codes.

Review Active Codes

Before clearing any codes, review all active fault codes and record them for your reference. This information can be valuable if the problems recur. Compare these codes with your earlier diagnosis to ensure they match your expectations.

Clear Fault Codes

Select the option to clear fault codes or reset the EPS system. Your scanner may prompt you to confirm this action. Proceed with clearing the codes. The scanner should indicate whether the clearing process was successful. If the scanner reports an error or inability to clear codes, it may indicate that the underlying issue hasn't been resolved or that there's a communication problem with the EPS module.

System Reinitialization

After clearing the codes, turn off the ignition and disconnect your scanner. Wait approximately 5 minutes to allow the vehicle's electronic systems to fully power down. This waiting period is crucial as it allows the EPS module to reset completely.

Verification Test

After the waiting period, restart the vehicle and check if the EPS warning light has gone out. Perform a test drive to verify that the power steering is functioning correctly. Pay attention to steering feel at different speeds and during various maneuvers. If everything functions normally, the issue has been successfully resolved.

Rechecking for Codes

After driving the vehicle for a short period, reconnect the scanner and check if any fault codes have returned. If no codes are present, the clearing procedure was successful and the underlying issue has been resolved. If codes return immediately, this indicates that the root problem still exists and requires further attention.

Remember that clearing fault codes without addressing the underlying issue will only temporarily remove the warning indicators. For lasting resolution, always diagnose and repair the actual problem before clearing the codes.

When to Seek Professional Assistance

While many power steering issues can be diagnosed and even resolved by knowledgeable vehicle owners, certain situations warrant professional assistance. Here are key scenarios when you should consider consulting a specialist:

Persistent Fault Codes

If fault codes return immediately after clearing them, this indicates an ongoing issue that hasn't been resolved. Professional diagnostic equipment can provide more detailed information about the specific component failures or signal issues that may not be accessible with consumer-grade scanners.

Complete Loss of Power Assistance

If your Proace Electric has lost all power steering assistance, making the vehicle difficult to steer, immediate professional attention is recommended. Driving without power assistance can be dangerous, particularly in emergency situations requiring quick steering responses.

Intermittent Issues

Steering problems that come and go can be particularly challenging to diagnose. Professional technicians have experience with intermittent issues and access to advanced monitoring equipment that can capture data during fault occurrences.

After a Collision

If your vehicle has been involved in even a minor collision that affected the front end, professional inspection of the steering system is essential. Impact damage can affect steering components in ways that aren't immediately obvious but could lead to failure later.

Unusual Noises or Vibrations

Strange noises (clicking, grinding, or whining) or vibrations through the steering wheel often indicate mechanical problems that require professional diagnosis and repair. These symptoms could point to issues with the steering rack, motor, or mounting points.

Complex EPS Module Issues

Problems with the EPS control module itself, including software issues or internal electronic failures, typically require specialized equipment for reprogramming or replacement. These procedures are beyond the scope of most DIY repairs.

At Sing Spare Parts Co, we specialize in diagnosing and resolving complex steering system issues. With over 50 years of experience in reconditioning steering components, our team has the expertise to address even the most challenging power steering problems in the Proace Electric. Our proprietary SP3G reconditioning method ensures that repaired components meet or exceed original specifications, providing reliability and performance you can trust.

Preventive Maintenance for EPS Systems

While Electric Power Steering systems generally require less maintenance than traditional hydraulic systems, preventive care can significantly extend their lifespan and help avoid costly repairs. Here are essential maintenance practices for keeping your Proace Electric's power steering system in optimal condition:

Regular Battery Maintenance

The EPS system in the Proace Electric depends on proper voltage to function correctly. Ensure your vehicle's 12V battery is in good condition with clean, tight connections. Even though the main propulsion battery powers the vehicle, the 12V system powers critical electronics including the power steering. Have your battery tested regularly, especially before extreme weather seasons.

Maintain Proper Tire Pressure and Alignment

Uneven tire pressure or poor alignment can place additional strain on the power steering system. Follow the manufacturer's recommendations for tire pressure and have your alignment checked regularly, especially after hitting potholes or curbs. This not only preserves your steering components but also extends tire life and improves handling.

Keep Electrical Systems in Good Condition

The EPS system is part of a complex network of electronic components. Ensure all fuses related to the power steering are in good condition. If you're performing any electrical modifications to your vehicle, be cautious about potential impacts on the steering system's power supply or communication networks.

Inspect Steering Components Visually

Periodically inspect visible steering components for signs of damage or wear. Check for cracks in boots that protect the steering rack ends, loose mounting bolts, damaged wiring, or signs of impact damage. Early detection of these issues can prevent more serious problems from developing.

Listen for Warning Sounds

Be attentive to any new noises when turning the steering wheel. Grinding, clicking, or whirring sounds can indicate developing problems with the steering motor, rack, or other components. Addressing these sounds early can prevent complete system failure.

Periodic Professional Inspection

Include steering system checks as part of your regular vehicle maintenance schedule. Professional technicians can spot potential issues before they become serious problems. They can also perform steering system diagnostics that may reveal early warning signs not yet apparent during normal driving.

By following these preventive maintenance practices, you can maximize the lifespan of your Proace Electric's power steering system and minimize the likelihood of encountering fault codes and performance issues. Remember that proactive care is always more cost-effective than reactive repairs.

Conclusion

Understanding and addressing power steering fault codes in your Proace Electric doesn't have to be intimidating. With the right knowledge and approach, many issues can be diagnosed and resolved without extensive technical expertise. This guide has walked you through the essential aspects of the Proace Electric's power steering system, common fault codes, diagnostic procedures, and proper methods for clearing codes once underlying issues are resolved.

Remember that while clearing fault codes is a straightforward process, it should always be preceded by proper diagnosis and resolution of the underlying issue. Simply clearing codes without fixing the problem will result in their quick return and potentially allow minor issues to develop into major failures.

For complex issues, persistent fault codes, or situations where you're unsure about the appropriate course of action, professional assistance is your best option. The electric power steering system is a safety-critical component of your vehicle, and proper function is essential for safe driving.

At Sing Spare Parts Co, we've built our reputation on delivering expert reconditioning services for steering systems since 1970. Our specialized knowledge of both traditional and electric power steering components positions us uniquely to address the challenges of modern vehicle systems like those found in the Proace Electric. Whether you need diagnostic assistance, component reconditioning, or complete steering system replacement, our team stands ready to provide solutions that restore performance and reliability to your vehicle.

Maintaining a properly functioning electric power steering system in your Proace Electric is essential for both driving comfort and safety. By understanding common fault codes, performing proper diagnosis, and following the correct procedures for clearing codes, you can address many steering issues effectively. Regular preventive maintenance further helps avoid unexpected failures and extends the lifespan of steering components.

For situations requiring specialized expertise, remember that professional assistance from experienced technicians with specific knowledge of electric power steering systems is invaluable. With the right approach to maintenance and troubleshooting, your Proace Electric can continue to deliver the responsive, precise steering performance it was designed to provide.

If you're experiencing persistent power steering issues with your Proace Electric or need expert assistance with diagnosis and repairs, contact Sing Spare Parts Co today. Our team specializes in reconditioning steering racks, drive shafts, and other critical components for all vehicle types, including electric and hybrid models. With over 50 years of experience and our proprietary SP3G reconditioning method, we deliver solutions that restore performance while providing excellent value. Explore our range of reconditioned electric steering racks, drive shaft assemblies, and constant velocity joints designed to meet the highest standards of quality and durability.