C0654 - Understanding the Power Steering Control Module Issue in 2010-2017 Chevrolet Equinox and GMC Terrain

Quick Answer

C0654 means: C0654 signifies a malfunction in the power steering control module, affecting steering response.

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

Can I drive with C0654? Immediate attention is recommended to prevent safety issues and further damage.

Common Questions

What does C0654 mean and how does it affect my car?

C0654 indicates a malfunction in your vehicle's power steering control module, which can lead to difficulty steering and increased fatigue while driving. If not addressed, it can significantly affect your vehicle's safety and performance.

What are the most common causes of C0654 and how much does it cost to fix?

The most common causes of C0654 include a faulty power steering control module or damaged wiring. Repair costs can range from $150 for wiring repairs to $600 for module replacement, depending on the issue.

Can I drive my car with C0654 or should I stop immediately?

It's advisable to avoid driving your vehicle with C0654, as it can lead to steering difficulties that pose a safety risk. Immediate diagnosis and repair are recommended.

How can I diagnose C0654 myself using GeekOBD APP?

Using the GeekOBD APP, connect to your vehicle's OBD2 port to retrieve codes and freeze frame data. This will provide insight into the issue, helping you identify if the power steering control module requires attention.

What vehicles are most commonly affected by C0654?

C0654 is most commonly found in the 2010-2017 Chevrolet Equinox and GMC Terrain, among other models. Checking for any recalls or technical service bulletins (TSBs) related to power steering can also be beneficial.

How can I prevent C0654 from happening again?

Regular vehicle maintenance, including checking power steering fluid levels and inspecting electrical connections, can help prevent C0654 from recurring. Keeping up with software updates is also advisable.

What is C0654?

The diagnostic trouble code (DTC) C0654 indicates a malfunction in the power steering control module, particularly in vehicles like the 2010-2017 Chevrolet Equinox and GMC Terrain. This code generally signifies that the power steering system is not functioning correctly, which can lead to increased steering effort, especially at lower speeds. The power steering control module is responsible for regulating the electric power steering system, and when it fails or detects an issue, it can trigger this code. Real-world implications include difficulty steering, increased driver fatigue, and a potential safety hazard if the steering system becomes completely unresponsive. Ignoring this code can lead to further damage in the steering components and result in costly repairs down the line. It's crucial to address the underlying issue promptly to avoid deterioration of the power steering system and ensure safe vehicle operation.

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

Symptoms

Common symptoms when C0654 is present:

  • The check engine light may illuminate, indicating a problem with the vehicle's electronic systems.
  • You might experience difficulty in steering, especially at lower speeds or during parking maneuvers, making the vehicle feel heavier than usual.
  • Drivers may notice unusual noises coming from the steering column, such as whining or grinding, which can indicate a failing power steering system.
  • Fuel economy could decrease as the power steering system struggles to operate efficiently, leading to potential performance issues.
  • In some cases, the power steering may fail unexpectedly, resulting in a complete loss of steering assist, which poses a significant safety risk.

Possible Causes

Most common causes of C0654 (ordered by frequency):

  1. The most common cause of code C0654 is a faulty power steering control module, which can occur in about 60% of cases. This failure can stem from electrical issues or internal component breakdown.
  2. Another cause could be damaged wiring or poor connections in the power steering system, accounting for approximately 25% of cases. Corrosion or frayed wires can disrupt communication between components.
  3. A third cause may involve the power steering pump itself, which can lead to insufficient fluid pressure affecting the module's operation. Regular maintenance can help prevent this.
  4. Less common but serious causes include software issues within the module, which may require a reflash or software update to resolve.
  5. Rarely, the problem may originate from a malfunction in the vehicle's Body Control Module (BCM), which can interfere with the power steering system's performance.

C0654 Repair Costs

Cost Breakdown by Repair Type

Power Steering Control Module Replacement

Replacing the faulty power steering control module with a new unit.

  • Total: $300 - $600
  • Success rate: 80%
Wiring Repair

Repairing or replacing damaged wiring or connectors in the steering system.

  • Total: $150 - $300
  • Success rate: 75%
Software Update

Updating the software in the power steering control module to resolve software-related issues.

  • Total: $100 - $150
  • Success rate: 70%
Money-Saving Tips for C0654
  • 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 C0654 Diagnosis Process

Follow these systematic steps to accurately diagnose C0654. Each step builds on the previous one to ensure accurate diagnosis.

Step 1: Step 1: Conduct an initial visual inspection to identify any visible issues such as damaged wiring, loose connections, or corrosion that may be affecting the power steering system (5-10 minutes)

Step 1: Conduct an initial visual inspection to identify any visible issues such as damaged wiring, loose connections, or corrosion that may be affecting 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: Use an OBD2 scanner, like the GeekOBD APP, to retrieve all diagnostic trouble codes and freeze frame data, which can provide context for the C0654 error (10-15 minutes)

Step 2: Use an OBD2 scanner, like the GeekOBD APP, to retrieve all diagnostic trouble codes and freeze frame data, which can provide context for the C0654 error (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: Perform component testing using a multimeter to check the voltage and ground at the power steering control module, ensuring it is receiving the necessary signals (20-30 minutes)

Step 3: Perform component testing using a multimeter to check the voltage and ground at the power steering control module, ensuring it is receiving the necessary signals (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: After repairs, conduct a system function test to verify the power steering system operates correctly, and clear any trouble codes from the memory (10-15 minutes)

Step 4: After repairs, conduct a system function test to verify the power steering system operates correctly, and clear any trouble codes from the memory (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: Complete a road test under various driving conditions to ensure that the repair resolved the issue and that the steering system is functioning correctly (15-20 minutes)

Step 5: Complete a road test under various driving conditions to ensure that the repair resolved the issue and that the steering system is functioning correctly (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 2015 Chevrolet Equinox

Vehicle: 2015 Chevrolet Equinox, 75,000 miles

Problem: Customer reported difficulty steering and illuminated check engine light.

Diagnosis: Diagnostic scan revealed code C0654. Visual inspection showed no wiring damage, but testing confirmed a faulty power steering control module.

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

Cost: $450 (part: $300, labor: $150)

Result: Steering function restored to normal; customer reported improved driving experience.

Case Study 2: Wiring Repair in 2012 GMC Terrain

Vehicle: 2012 GMC Terrain, 85,000 miles

Problem: Customer experienced intermittent steering assist loss and code C0654.

Diagnosis: Visual inspection revealed corrosion on the wiring harness connected to the power steering module.

Solution: Repaired the damaged wiring and secured connections.

Cost: $200 (part: $50, labor: $150)

Result: Issue resolved; customer reported no further problems after repair.

Diagnose C0654

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: C0654
System: Chassis (ABS, Steering, Suspension)
Severity: HIGH
Category: Chassis Codes