C0636 - Understanding the Code and Its Impact on Your Vehicle

Quick Answer

C0636 means: C0636 indicates a malfunction in the vehicle's power steering assist system.

Fix: Check and replace faulty components Cost: $150 - $300 Time: 90-180 minutes

Can I drive with C0636? Immediate inspection and repair are recommended to ensure safe vehicle operation.

Common Questions

What does C0636 mean and how does it affect my car?

The C0636 code indicates a problem with the power steering assist system, which may lead to heavy steering and difficulties in maneuverability. If left unaddressed, it can result in complete loss of steering assistance, posing a significant safety risk.

What are the most common causes of C0636 and how much does it cost to fix?

Common causes include a faulty steering angle sensor and a malfunctioning power steering control module. Repair costs can range from $150 to $600 depending on the necessary repairs.

Can I drive my car with C0636 or should I stop immediately?

Driving with a C0636 code is not recommended due to the potential for steering issues. It's safest to have the vehicle inspected and repaired promptly to avoid dangerous situations.

How can I diagnose C0636 myself using GeekOBD APP?

You can use the GeekOBD APP to scan for codes, retrieve freeze frame data, and monitor real-time data from the steering angle sensor to help pinpoint the issue effectively.

What vehicles are most commonly affected by C0636?

The C0636 code is frequently reported in vehicles like the 2014-2018 Chevrolet Silverado, 2015-2019 GMC Sierra, and various models from Ford and Chrysler, particularly those with electronic power steering systems.

How can I prevent C0636 from happening again?

Regular maintenance, including checking the power steering fluid levels, inspecting wiring for wear and tear, and ensuring proper software updates can help prevent the recurrence of the C0636 code.

What is C0636?

The diagnostic trouble code (DTC) C0636 relates to issues within the vehicle's stability control system, specifically signaling a malfunction in the power steering assist functionality. This code is most commonly seen in vehicles equipped with electronic power steering (EPS), such as the 2014-2018 Chevrolet Silverado and other GM models. When C0636 is triggered, it indicates that the steering angle sensor or the power steering control module has detected a fault. This can lead to various driving challenges, including a loss of power steering assistance, making steering harder and potentially dangerous. Drivers may notice a significant increase in steering effort, especially at low speeds. Additionally, the vehicle may exhibit abnormal responses during maneuvers, such as sharp turns or lane changes. Ignoring this code can lead to further complications, including complete loss of steering assistance, which poses serious safety risks. It's crucial for vehicle owners to address this issue promptly, not only to ensure safety but also to avoid more expensive repairs down the line.

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

Symptoms

Common symptoms when C0636 is present:

  • The check engine light or stability control light is illuminated on the dashboard, indicating a system malfunction.
  • Steering feels unusually heavy or stiff, especially during low-speed maneuvers, making it difficult to turn the wheel.
  • Increased effort is required to steer the vehicle, leading to driver fatigue during long trips.
  • The vehicle may wander or have difficulty maintaining a straight line on the road, affecting handling and safety.
  • Unusual noise from the power steering system, such as whining or grinding, may accompany the symptoms.

Possible Causes

Most common causes of C0636 (ordered by frequency):

  1. The most common cause of C0636 is a faulty steering angle sensor, which is responsible for detecting the steering wheel's position. This issue has a likelihood of around 60% among reported cases.
  2. Another potential cause is a malfunctioning power steering control module. This module manages the power steering system's electronic functions, and its failure can lead to loss of assistive power steering capabilities.
  3. A loose or damaged wiring harness connected to the power steering system can also trigger the C0636 code. Regular inspections can help prevent this issue by ensuring connections are secure and intact.
  4. Less common but serious issues include a complete failure of the power steering pump or fluid leaks in the power steering system, which can lead to total loss of steering assistance.
  5. A rare cause may be related to software glitches in the vehicle's onboard computer system, which may require a software update to resolve.

C0636 Repair Costs

Cost Breakdown by Repair Type

Steering Angle Sensor Replacement

Replacing the faulty steering angle sensor to restore proper function and eliminate the C0636 code.

  • Total: $150 - $300
  • Success rate: 90%
Power Steering Control Module Replacement

Replacing the control module if diagnosed as faulty, which is necessary for the proper operation of the EPS.

  • Total: $300 - $600
  • Success rate: 85%
Wiring Repair

Repairing or replacing damaged wiring or connectors related to the power steering system.

  • Total: $100 - $200
  • Success rate: 80%
Money-Saving Tips for C0636
  • 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 C0636 Diagnosis Process

Follow these systematic steps to accurately diagnose C0636. 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 in the power steering system (5-10 minutes)

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

Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context better (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 the steering angle sensor and power steering control module for proper voltage and continuity (20-30 minutes)

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the steering angle sensor and power steering control module for proper voltage and continuity (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 operation of the power steering system after repairs and clear codes to see if they return (10-15 minutes)

Step 4: System function test - Verify the operation of the power steering system after repairs and clear codes to see if they return (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 steering assistance is restored and the code does not reappear (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm that steering assistance is restored and the code does not 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: Steering Angle Sensor Replacement on 2016 Chevrolet Silverado

Vehicle: 2016 Chevrolet Silverado, 45,000 miles

Problem: Customer reported heavy steering and illumination of the check engine light.

Diagnosis: Diagnostic scan revealed C0636 code along with a visual inspection showing a faulty steering angle sensor.

Solution: The steering angle sensor was replaced, and the vehicle was re-scanned to ensure the code cleared.

Cost: $250 (sensor cost: $150, labor: $100)

Result: Customer reported restored steering assistance and no reappearance of the C0636 code.

Case Study 2: Power Steering Control Module Replacement on 2015 Ford Fusion

Vehicle: 2015 Ford Fusion, 50,000 miles

Problem: Vehicle exhibited unresponsiveness in steering at low speeds and stability control light was on.

Diagnosis: OBD2 scan indicated C0636; further testing confirmed a malfunctioning power steering control module.

Solution: Replaced the power steering control module, recalibrated the system, and performed a road test.

Cost: $500 (module cost: $350, labor: $150)

Result: The steering issue was resolved, and the vehicle was back to normal function.

Diagnose C0636

Use GeekOBD APP for professional diagnosis!

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Code Information

Code: C0636
System: Chassis (ABS, Steering, Suspension)
Severity: HIGH
Category: Chassis Codes