Quick Answer
B0978 means: B0978 refers to a malfunction in the Power Steering Control Module.
Can I drive with B0978? Immediate attention is recommended to ensure safe driving.
Common Questions
What does B0978 mean and how does it affect my car?
The B0978 code indicates a malfunction in your vehicle's Power Steering Control Module, which can lead to heavy or unresponsive steering. This can affect your ability to steer the car safely, especially at lower speeds or during parking maneuvers.
What are the most common causes of B0978 and how much does it cost to fix?
The most common cause of B0978 is a faulty Power Steering Control Module, which can cost between $300 and $600 to replace. Other causes include damaged wiring, which can be repaired for $150 to $300.
Can I drive my car with B0978 or should I stop immediately?
It's advisable to stop driving your car as soon as you notice the B0978 code or any related symptoms, as this can lead to a complete loss of power steering, making driving unsafe.
How can I diagnose B0978 myself using GeekOBD APP?
Using the GeekOBD APP, you can scan for trouble codes, view freeze frame data, and check the system's live data to help identify the issue with the PSCM. Follow the on-screen prompts to perform diagnostics.
What vehicles are most commonly affected by B0978?
B0978 is commonly found in the 2015-2019 Ford Focus, but can also affect other Ford models with similar electric power steering systems. Check for any recalls related to the power steering system.
How can I prevent B0978 from happening again?
Regular maintenance of your vehicle's steering system, including checking wiring and connectors for wear, ensuring proper fluid levels, and addressing any warning lights promptly can help prevent the recurrence of B0978.
What is B0978?
DTC B0978 indicates an issue with the Power Steering Control Module (PSCM) in your vehicle. This trouble code is specifically relevant for certain Ford models, including the 2015-2019 Ford Focus. The PSCM is responsible for controlling the electric power steering system, which provides assistance to the driver when steering the vehicle. When the B0978 code is triggered, it typically means that there is a malfunction within the PSCM or a related component that is impacting its performance. Drivers may experience symptoms such as difficulty steering, a warning light on the dashboard, or even complete loss of power steering assistance. This can lead to a significantly reduced ability to maneuver the vehicle, especially at low speeds or when parking, posing a safety risk. Addressing this code promptly is crucial, as ignoring it can lead to further electrical issues or even complete steering failure. In practical terms, resolving a B0978 code often involves inspecting the wiring and connectors associated with the PSCM, testing the module itself for faults, and potentially replacing faulty components. Regular maintenance and attention to steering system components can help prevent such issues from arising in the future.
System: B - Body (Airbags, Lighting, Security, Climate Control)
Symptoms
Common symptoms when B0978 is present:
- Steering wheel feels heavy or unresponsive, making it difficult to turn the vehicle.
- Dashboard warning light indicates a power steering issue, alerting the driver to potential problems.
- Increased steering effort required at low speeds, especially during parking maneuvers.
- Strange noises such as grinding or whining when steering, indicating potential mechanical failure.
- Intermittent power steering assistance, where the steering may work fine at times but fails unexpectedly.
Possible Causes
Most common causes of B0978 (ordered by frequency):
- Faulty Power Steering Control Module (PSCM) is the most common cause, accounting for about 60% of B0978 occurrences. This can happen due to internal component failure or electrical issues.
- Damaged wiring or connectors related to the PSCM, which can occur from wear and tear or corrosion, is the second most common cause (25%).
- Low power steering fluid levels, which can lead to overheating and damage to the system if not addressed, accounts for around 10%. Keeping fluid levels topped up can prevent this issue.
- Less common, but serious, is the failure of the steering rack assembly, which may require extensive repairs or replacement.
- A rare cause could be a software issue within the vehicle's ECU, requiring reprogramming or updates to resolve.
B0978 Repair Costs
Cost Breakdown by Repair Type
Power Steering Control Module Replacement
Replacing a faulty PSCM with a new unit.
- Total: $300 - $600
- Success rate: 95%
Wiring Repair or Replacement
Repairing or replacing damaged wiring affecting the PSCM.
- Total: $150 - $300
- Success rate: 90%
Money-Saving Tips for B0978
- 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 B0978 Diagnosis Process
Follow these systematic steps to accurately diagnose B0978. Each step builds on the previous one to ensure accurate diagnosis.
Step 1: Step 1: Perform an initial visual inspection of the steering system, checking for damaged wiring, loose connections, or corrosion around the PSCM (5-10 minutes)
Step 1: Perform an initial visual inspection of the steering system, checking for damaged wiring, loose connections, or corrosion around the PSCM (5-10 minutes).
Step 2: Step 2: Use the GeekOBD APP to scan for diagnostic trouble codes and freeze frame data, providing insight into the fault context and recent vehicle performance (10-15 minutes)
Step 2: Use the GeekOBD APP to scan for diagnostic trouble codes and freeze frame data, providing insight into the fault context and recent vehicle performance (10-15 minutes).
Step 3: Step 3: Conduct component testing, using a multimeter to test for voltage and continuity in the PSCM and its wiring (20-30 minutes)
Step 3: Conduct component testing, using a multimeter to test for voltage and continuity in the PSCM and its wiring (20-30 minutes).
Step 4: Step 4: After repairs, perform a system function test to ensure the PSCM operates correctly and clear any stored codes (10-15 minutes)
Step 4: After repairs, perform a system function test to ensure the PSCM operates correctly and clear any stored codes (10-15 minutes).
Step 5: Step 5: Road test the vehicle under various conditions to confirm proper steering operation and check for any returning symptoms (15-20 minutes)
Step 5: Road test the vehicle under various conditions to confirm proper steering operation and check for any returning symptoms (15-20 minutes).
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 a 2016 Ford Focus
Vehicle: 2016 Ford Focus, 75,000 miles
Problem: Customer reported difficulty steering and dashboard warning light.
Diagnosis: After scanning with the GeekOBD APP, B0978 was confirmed. Visual inspection revealed corroded connectors.
Solution: Replaced the Power Steering Control Module and repaired wiring connections.
Cost: $450 (Module: $350, Labor: $100)
Result: Steering responsiveness restored, no further issues reported.
Case Study 2: Wiring Repair for B0978 in a 2017 Ford Escape
Vehicle: 2017 Ford Escape, 50,000 miles
Problem: Customer experienced intermittent power steering assistance.
Diagnosis: Diagnostic scan revealed B0978; further inspection showed damaged wiring harness.
Solution: Repaired wiring and cleared error codes.
Cost: $200 (Labor: $150, Parts: $50)
Result: Power steering restored to normal functionality.