Understanding the HONDA OBD DTC C1555 Trouble Code

Understanding the HONDA OBD DTC C1555 Trouble Code

The C1555 trouble code is a diagnostic trouble code (DTC) that appears in the On-Board Diagnostics (OBD) system of Honda vehicles. This code typically indicates an issue with the vehicle’s Electric Power Steering (EPS) system. When this code is triggered, it usually means there is a malfunction within the EPS control unit or related components.

Top 20 Honda Vehicles Commonly Affected by the C1555 Code

  • Honda Accord
  • Honda Civic
  • Honda CR-V
  • Honda Fit
  • Honda HR-V
  • Honda Insight
  • Honda Odyssey
  • Honda Passport
  • Honda Pilot
  • Honda Ridgeline
  • Honda Element
  • Honda Crosstour
  • Honda S2000
  • Honda CR-Z
  • Honda Prelude
  • Honda Clarity
  • Honda Jazz
  • Honda City
  • Honda Brio
  • Honda Amaze

Implications of the C1555 Code for Vehicle Performance and Emissions

The C1555 code primarily affects the Electric Power Steering system. Here are some of the implications:

  • Steering Performance: The vehicle may experience a loss of power steering assistance, making it harder to steer, especially at lower speeds.
  • Safety: Reduced steering assistance can pose a safety risk, particularly during emergency maneuvers.
  • Emissions: While the C1555 code does not directly affect emissions, any malfunction in the vehicle’s systems can lead to broader performance issues that might indirectly impact fuel efficiency and emissions.

Diagnosing and Fixing the C1555 Code

Key Symptoms

  • Steering Wheel Warning Light: The EPS warning light may illuminate on the dashboard.
  • Hard Steering: Increased effort required to turn the steering wheel.
  • Intermittent Steering Assistance: Power steering may work intermittently.

Diagnostic Steps

  1. OBD-II Scanner: Use an OBD-II scanner to confirm the C1555 code and check for any additional codes.
  2. Inspect EPS Components: Examine the EPS control unit, wiring, and connectors for any visible damage or loose connections.
  3. Check Battery Voltage: Ensure the battery voltage is within the proper range, as low voltage can affect the EPS system.
  4. Test EPS Motor: Verify the operation of the EPS motor to ensure it is functioning correctly.


  • Reset the Code: Sometimes, resetting the code and restarting the vehicle can clear temporary issues.
  • Repair Wiring: Fix any damaged wiring or connectors related to the EPS system.
  • Replace EPS Control Unit: If the control unit is faulty, it may need to be replaced.
  • Professional Diagnosis: If the issue persists, seek professional diagnostic services to pinpoint the exact cause.

FAQ Section

Q: Is it safe to drive with the C1555 code?
A: Driving with the C1555 code can be risky due to the potential loss of power steering assistance. It’s advisable to address the issue promptly.

Q: What are the potential repair costs for the C1555 code?
A: Repair costs can vary widely. Simple fixes like repairing wiring may cost around $100-$200, while replacing the EPS control unit can be more expensive, ranging from $500 to $1,500.

Q: How can I prevent the C1555 code from appearing?
A: Regular maintenance and inspections of the EPS system can help prevent issues. Ensure the battery is in good condition and that all electrical connections are secure.


Addressing the C1555 trouble code in your Honda vehicle is crucial for maintaining optimal steering performance and overall vehicle safety. By understanding the symptoms, diagnostic steps, and potential solutions, you can take proactive measures to resolve the issue promptly. Regular maintenance and timely repairs will ensure your Honda remains reliable and efficient, keeping you safe on the road.

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