U0457 - Communication Error in Electric Power Steering (Common in 2016-2020 Chevrolet Equinox)

Quick Answer

U0457 means: U0457 indicates a communication error in the electric power steering system.

Fix: Check and replace faulty components Cost: $100 - $400 Time: 90-180 minutes

Can I drive with U0457? Immediate attention is recommended to ensure safe vehicle operation.

Common Questions

What does U0457 mean and how does it affect my car?

U0457 indicates a communication error in your vehicle's electric power steering system. This can lead to hard steering or complete loss of power steering assistance, making your vehicle hard to control. Immediate attention is necessary to prevent safety hazards.

What are the most common causes of U0457 and how much does it cost to fix?

Common causes include damaged wiring (60% likelihood), a faulty EPS control module, and poor battery health. Repairs can cost between $50 for basic maintenance to $800 for replacing the control module.

Can I drive my car with U0457 or should I stop immediately?

Driving with a U0457 code can be dangerous due to potential loss of power steering. It is advisable to stop driving and have the issue diagnosed as soon as possible to ensure your safety.

How can I diagnose U0457 myself using GeekOBD APP?

Using the GeekOBD APP, connect to your car's OBD2 port to read diagnostic codes. Review the U0457 code detail and any freeze frame data to understand the conditions under which the error occurred, which can guide your next steps.

What vehicles are most commonly affected by U0457?

Commonly affected vehicles include the Chevrolet Equinox (2016-2020), Chevrolet Malibu (2016-2020), and other GM vehicles with similar EPS systems. Always check for recalls or technical service bulletins related to steering systems.

How can I prevent U0457 from happening again?

Regular maintenance, including checking and cleaning battery terminals, inspecting wiring connections, and monitoring the EPS system's performance can help prevent U0457 from recurring.

What is U0457?

The U0457 diagnostic trouble code (DTC) indicates a communication error in the vehicle's electric power steering (EPS) system, specifically pointing to a malfunction in the communication between the EPS control module and other vehicle modules. This issue can arise due to faulty wiring, poor connections, or even a malfunctioning EPS control module itself. When this code is triggered, it can lead to significant issues, such as the inability to steer the vehicle properly or reduced steering assistance, which can compromise safety. In many instances, the Check Engine Light or Power Steering Warning Light may illuminate on the dashboard, prompting immediate attention. Drivers may experience symptoms like increased steering effort or a complete loss of power steering assistance. The implications of ignoring this code can lead to further damage to the steering system, potentially resulting in costly repairs if not addressed promptly. Therefore, understanding U0457 and its effects is crucial for maintaining vehicle safety and performance.

System: U - Network (Communication, CAN Bus)

Symptoms

Common symptoms when U0457 is present:

  • The Check Engine Light or Power Steering Warning Light stays illuminated on the dashboard, indicating a problem with the EPS system.
  • Drivers may notice increased steering effort, making it difficult to turn the steering wheel, particularly at low speeds.
  • Many experience a sudden loss of power steering assistance, leading to a feeling of heaviness in the steering wheel, which can be alarming during driving.
  • In some cases, drivers report intermittent steering assistance that works sporadically, making it unpredictable and challenging to control the vehicle.
  • Additionally, unusual noises from the steering column may be present, such as grinding or whining sounds while steering.

Possible Causes

Most common causes of U0457 (ordered by frequency):

  1. The most common cause of U0457 is damaged wiring or connectors related to the EPS system, occurring in about 60% of cases. Inspecting and repairing these connections can often resolve the issue.
  2. A malfunctioning EPS control module is the second most common cause. This module may fail due to internal faults or software issues, leading to communication errors.
  3. Poor vehicle battery health can also trigger U0457. Keeping the battery terminals clean and ensuring optimal charge can help prevent this issue.
  4. Less common but serious causes include issues with the vehicle’s main wiring harness, which can affect multiple systems, including power steering.
  5. Rarely, a problematic engine control module (ECM) can cause U0457, leading to communication disruptions across various vehicle systems.

U0457 Repair Costs

Cost Breakdown by Repair Type

Wiring Repair

Repairing damaged wiring or connectors in the EPS system.

  • Total: $100 - $400
  • Success rate: 85%
EPS Control Module Replacement

Replacing the faulty EPS control module if it is determined to be defective.

  • Total: $400 - $800
  • Success rate: 90%
Battery Service

Cleaning battery terminals and ensuring the battery is functioning correctly to prevent further issues.

  • Total: $50 - $100
  • Success rate: 75%
Money-Saving Tips for U0457
  • Start with the most common and least expensive repairs first
  • Use GeekOBD APP to confirm diagnosis before replacing expensive parts
  • Consider preventive maintenance to avoid future occurrences
  • Compare prices for OEM vs aftermarket parts based on your needs
  • Address the issue promptly to prevent more expensive secondary damage

Diagnostic Steps

Professional U0457 Diagnosis Process

Follow these systematic steps to accurately diagnose U0457. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Initial visual inspection - Check for obvious signs of damaged wiring, loose connections, or corrosion in the EPS wiring harness (5-10 minutes)

Step 1: Initial visual inspection - Check for obvious signs of damaged wiring, loose connections, or corrosion in the EPS wiring harness (5-10 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 2: Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context, which takes about 10-15 minutes

Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context, which takes about 10-15 minutes.

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 3: Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components, focusing on wiring continuity and module functionality (20-30 minutes)

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components, focusing on wiring continuity and module functionality (20-30 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 4: Step 4: System function test - Verify the proper operation of the EPS system after repairs and clear codes to ensure no further issues are detected (10-15 minutes)

Step 4: System function test - Verify the proper operation of the EPS system after repairs and clear codes to ensure no further issues are detected (10-15 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.
Step 5: Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and stable steering performance (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and stable steering performance (15-20 minutes).

GeekOBD APP Tip: Use GeekOBD APP to monitor real-time data during this diagnostic step for accurate results and professional-grade analysis.

Important Notes

  • Always verify the repair with GeekOBD APP after completing diagnostic steps
  • Clear codes and test drive to ensure the problem is resolved
  • Address underlying causes to prevent code recurrence

Real Repair Case Studies

Case Study 1: Repair Case Study: 2017 Chevrolet Equinox Power Steering Failure

Vehicle: 2017 Chevrolet Equinox, 65,000 miles

Problem: Customer reported difficulty steering and warning lights illuminated.

Diagnosis: Initial inspection revealed damaged wiring harness; OBD2 scan confirmed U0457.

Solution: Repaired the wiring and cleared the DTC, restoring normal power steering function.

Cost: $250 (wiring repair and labor)

Result: Customer reported complete resolution of steering issue and satisfaction with repairs.

Case Study 2: Repair Case Study: 2018 Chevrolet Malibu EPS Malfunction

Vehicle: 2018 Chevrolet Malibu, 40,000 miles

Problem: Driver experienced intermittent power steering assistance.

Diagnosis: Diagnostic scan identified U0457; further testing showed a faulty EPS control module.

Solution: Replaced the EPS control module and reprogrammed the system.

Cost: $700 (control module and labor)

Result: Post-repair road test confirmed full restoration of steering assistance.

Diagnose U0457

Use GeekOBD APP for professional diagnosis!

  • Real-time data monitoring
  • Advanced diagnostic features
  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: U0457
System: Network (Communication, CAN Bus)
Severity: HIGH
Category: Network Codes