C0729 - Understanding the Power Steering Control Module Code in 2015-2018 Honda Civic and Other Models

Quick Answer

C0729 means: C0729 refers to a malfunction in the power steering control module, affecting steering responsiveness.

Fix: Check and replace faulty components Cost: $300 - $600 Time: 90-180 minutes

Can I drive with C0729? Immediate attention is recommended due to potential steering safety issues.

Common Questions

What does C0729 mean and how does it affect my car?

C0729 indicates a problem with the power steering control module, which can lead to heavy steering and unsafe driving conditions. Ignoring this code can worsen the issue and could result in a complete loss of power steering assist.

What are the most common causes of C0729 and how much does it cost to fix?

Common causes include a faulty power steering control module or low fluid levels. Repair costs can range from $100 for a fluid flush to $600 for a module replacement, depending on the specific issue.

Can I drive my car with C0729 or should I stop immediately?

It's advisable to stop driving as soon as possible. Driving with a C0729 code can lead to steering difficulties, which pose a significant safety risk.

How can I diagnose C0729 myself using GeekOBD APP?

Using the GeekOBD APP, you can perform a scan to retrieve the C0729 code and check for related codes. The app also allows you to monitor live data from the steering system to identify irregularities.

What vehicles are most commonly affected by C0729?

The C0729 code is frequently seen in vehicles like the 2015-2018 Honda Civic, 2016-2019 Ford Focus, and 2017-2020 Chevrolet Malibu, among others. Keep an eye on recalls or TSBs related to these models.

How can I prevent C0729 from happening again?

Regular maintenance of the power steering system, including checking fluid levels and inspecting for leaks, can help prevent C0729 from recurring. Additionally, using a quality power steering fluid is crucial for optimal performance.

What is C0729?

The C0729 diagnostic trouble code (DTC) indicates a malfunction related to the power steering control module. This code often appears in vehicles like the 2015-2018 Honda Civic, among other models. Essentially, the power steering control module is responsible for regulating the assist provided to the steering system. When the module detects a fault, it triggers the C0729 code. Drivers may notice that the steering feel becomes heavy or unresponsive, which can pose a safety risk while driving. The code may be accompanied by the illumination of the check engine light, and in some cases, the vehicle may enter a limp mode, reducing power to the steering system to prevent further damage. This can lead to difficulties in maneuvering the vehicle, especially at low speeds. Real-world implications of this code mean that it’s crucial to address it promptly to avoid steering issues that could jeopardize safety. Ignoring this code may lead to more severe issues, including total power steering failure, which would require extensive repairs. Regular maintenance checks and prompt attention to steering-related symptoms can help mitigate the risks associated with this DTC.

System: C - Chassis (ABS, Steering, Suspension)

Symptoms

Common symptoms when C0729 is present:

  • Check engine light illuminates, which may stay on constantly, indicating a fault in the power steering system.
  • The steering wheel feels excessively heavy, especially during low-speed maneuvers, making it challenging to turn the vehicle.
  • Drivers may experience a sudden loss of power steering assist while driving, leading to increased steering effort required.
  • Unusual noises may occur when turning the steering wheel, such as whining or grinding sounds, suggesting issues with the power steering pump.
  • Intermittent power steering assist could happen, where it feels normal one moment and heavy the next, indicating an unstable condition.

Possible Causes

Most common causes of C0729 (ordered by frequency):

  1. The most common cause (around 60%) is a faulty power steering control module, often due to electrical issues or component wear.
  2. A second cause (25%) could be low power steering fluid levels, which can result from leaks or improper maintenance, leading to system failures.
  3. Another potential cause (10%) is damaged wiring or connectors that may disrupt communication between the steering components.
  4. Less common, but serious, is a failure within the steering rack itself, which can lead to severe steering complications if not addressed.
  5. A rare cause (5%) could be software malfunctions in the vehicle's control module, requiring a software update or reprogramming.

C0729 Repair Costs

Cost Breakdown by Repair Type

Power Steering Control Module Replacement

Replacing the faulty power steering control module, which is often the main issue for C0729.

  • Total: $300 - $600
  • Success rate: 90%
Power Steering Fluid Flush

Flushing the power steering system to remove contaminants and refilling with the correct fluid.

  • Total: $100 - $150
  • Success rate: 70%
Wiring Repair

Repairing or replacing damaged wiring or connectors that cause communication issues.

  • Total: $50 - $200
  • Success rate: 60%
Money-Saving Tips for C0729
  • 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 C0729 Diagnosis Process

Follow these systematic steps to accurately diagnose C0729. 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 (5-10 minutes)

Step 1: Initial visual inspection - Check for obvious signs like damaged wiring, loose connections, or corrosion (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 (10-15 minutes)

Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (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 related to the power steering system (20-30 minutes)

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test suspected components related to the power steering system (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 and clear codes using the GeekOBD APP (10-15 minutes)

Step 4: System function test - Verify proper operation after repairs and clear codes using the GeekOBD APP (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 ensure the steering response is restored (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and ensure the steering response is restored (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: Power Steering Control Module Replacement in 2016 Honda Civic

Vehicle: 2016 Honda Civic, 45,000 miles

Problem: Customer reported a heavy steering feel and check engine light on.

Diagnosis: After scanning with the GeekOBD APP, C0729 was confirmed. Visual inspection showed no fluid leaks but the power steering control module was not responding.

Solution: Replaced the power steering control module and cleared the codes.

Cost: $550 (including parts and labor)

Result: Steering responsiveness was restored, and no further issues were reported.

Case Study 2: Fluid Flush for C0729 in 2017 Ford Focus

Vehicle: 2017 Ford Focus, 30,000 miles

Problem: Customer experienced intermittent power steering assist with C0729 code.

Diagnosis: Diagnostic testing revealed low power steering fluid with no visible leaks.

Solution: Performed a complete power steering fluid flush and refill.

Cost: $120 (including labor and fluid)

Result: The issue was resolved, and the customer reported normal steering feel afterward.

Diagnose C0729

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: C0729
System: Chassis (ABS, Steering, Suspension)
Severity: HIGH
Category: Chassis Codes