U0128 - Understanding DTC U0128: Common in 2015-2018 Honda Civic and Other Models

Quick Answer

U0128 means: U0128 indicates a communication loss with the EPS module.

Fix: Check and replace faulty components Cost: $100 - $300 Time: 90-180 minutes

Can I drive with U0128? Immediate attention is recommended to prevent driving complications.

Common Questions

What does U0128 mean and how does it affect my car?

DTC U0128 signifies a communication issue between the vehicle's main computer and the EPS module. When this code appears, you may experience stiff steering or warning lights. It's essential to address this promptly to ensure safe driving conditions.

What are the most common causes of U0128 and how much does it cost to fix?

Common causes include wiring issues (50% likelihood), faulty EPS modules (30%), and connector corrosion. Repair costs can range from $100 for wiring repairs to $1,200 for module replacement, depending on the issue.

Can I drive my car with U0128 or should I stop immediately?

Driving with a U0128 code can be unsafe due to loss of power steering assist. If you experience stiff steering or warning lights, it's advisable to stop driving and seek professional assistance immediately to avoid potential accidents.

How can I diagnose U0128 myself using GeekOBD APP?

With the GeekOBD APP, you can retrieve diagnostic trouble codes, view live data, and check freeze frame information. Start by scanning for codes and noting any related issues that may help pinpoint the cause of U0128.

What vehicles are most commonly affected by U0128?

U0128 is frequently seen in 2015-2018 Honda Civics, some Toyota models, and various GM vehicles. Always check for manufacturer recalls or technical service bulletins related to EPS issues.

How can I prevent U0128 from happening again?

Regularly inspect wiring and connectors for damage, ensure proper maintenance of the steering system, and keep the vehicle's software updated to prevent potential communication errors.

What is U0128?

DTC U0128 refers to a communication issue between the vehicle control modules, specifically indicating a loss of communication with the vehicle's Electrical Power Steering Control Module (EPS). This code can arise when the EPS module fails to send or receive data, which can lead to serious performance issues, including a loss of power steering assist. In simple terms, it means your car's onboard computer is unable to communicate effectively with the EPS, impacting your steering response and overall driving experience. This can happen due to various reasons, including wiring issues, a faulty EPS module, or problems with the vehicle's main computer. Symptoms of this issue can range from a sudden stiffening of the steering wheel to warning lights illuminating on the dashboard. If left unresolved, it can lead to increased difficulty in steering, especially at low speeds, making it potentially unsafe for daily driving. Moreover, if the EPS module is not functioning correctly, it could also impact other systems within the vehicle, leading to further complications and repairs. Therefore, addressing a U0128 code promptly is crucial for both safety and vehicle performance.

System: U - Network (Communication, CAN Bus)

Symptoms

Common symptoms when U0128 is present:

  • Check engine light or EPS warning light illuminates, indicating a potential issue with the steering system and requiring immediate attention.
  • Steering wheel feels unusually stiff or unresponsive, particularly at low speeds, leading to difficulties in maneuvering the vehicle safely.
  • Increased effort is needed when turning the steering wheel, which may cause driver fatigue and a decrease in overall driving comfort.
  • The vehicle may experience intermittent power steering assist loss, resulting in random fluctuations in steering ease during driving.
  • Unusual noises coming from the steering column or EPS module area could indicate mechanical failures or electrical issues.

Possible Causes

Most common causes of U0128 (ordered by frequency):

  1. Wiring issues account for about 50% of U0128 codes, often caused by frayed wires or poor connections leading to signal loss.
  2. A faulty EPS module can cause communication failures, typically due to internal component failures or software glitches, making up around 30% of cases.
  3. Corrosion or damage at the connectors can contribute to poor signal transmission, emphasizing the importance of regular inspections and preventive maintenance.
  4. Less common causes include software issues within the vehicle's main computer, which may require a software update or reprogramming to resolve.
  5. In rare instances, malfunctioning sensors associated with the EPS system can trigger the U0128 code, necessitating thorough diagnostics to identify the root cause.

U0128 Repair Costs

Cost Breakdown by Repair Type

Wiring Repair

Repairing or replacing damaged wiring and connectors related to the EPS module.

  • Total: $100 - $300
  • Success rate: 80%
EPS Module Replacement

Replacing a faulty EPS module with a new or refurbished unit, including labor.

  • Total: $600 - $1,200
  • Success rate: 90%
Software Update

Updating or reprogramming the vehicle's main computer to resolve communication issues.

  • Total: $50 - $150
  • Success rate: 70%
Money-Saving Tips for U0128
  • 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 U0128 Diagnosis Process

Follow these systematic steps to accurately diagnose U0128. Each step builds on the previous one to ensure accurate diagnosis.

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

Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion around the EPS module and 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, focusing on U0128 and related codes (10-15 minutes)

Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context, focusing on U0128 and related codes (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 specialized diagnostic tools to test the EPS module and associated wiring for continuity and proper voltage (20-30 minutes)

Step 3: Component testing - Use a multimeter or specialized diagnostic tools to test the EPS module and associated wiring for continuity and proper voltage (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 proper operation after repairs, ensuring all connections are secure and clear the codes to monitor for recurrence (10-15 minutes)

Step 4: System function test - Verify proper operation after repairs, ensuring all connections are secure and clear the codes to monitor for recurrence (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 that the steering responds as expected and no warning lights reappear (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm that the steering responds as expected and no warning lights reappear (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: 2016 Honda Civic EPS Failure

Vehicle: 2016 Honda Civic, 45,000 miles

Problem: Customer reported a stiff steering wheel and EPS warning light.

Diagnosis: Visual inspection revealed frayed wiring near the EPS module, which was confirmed with multimeter testing.

Solution: Repaired damaged wiring and ensured all connections were secure.

Cost: $250 for wiring repair.

Result: Steering performance returned to normal, and no warning lights reappeared after road testing.

Case Study 2: Repair Case: 2017 Toyota Camry EPS Module Replacement

Vehicle: 2017 Toyota Camry, 50,000 miles

Problem: Customer experienced intermittent power steering loss and EPS light.

Diagnosis: OBD2 scan revealed U0128, and further testing pointed to a faulty EPS module.

Solution: Replaced the EPS module with a new unit.

Cost: $1,000 for parts and labor.

Result: Power steering function was restored, and the customer reported no further issues.

Diagnose U0128

Use GeekOBD APP for professional diagnosis!

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Code Information

Code: U0128
System: Network (Communication, CAN Bus)
Severity: HIGH
Category: Network Codes