P055C - Understanding DTC P055C: Power Steering Pressure Sensor Range/Performance Issue in Common Vehicles

Quick Answer

P055C means: DTC P055C indicates a problem with the power steering pressure sensor's performance or range.

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

Can I drive with P055C? It is advisable to address this code as soon as possible to avoid steering issues.

Common Questions

What does P055C mean and how does it affect my car?

DTC P055C indicates a range or performance issue with your power steering pressure sensor. This can lead to heavy steering, making your car difficult to maneuver, especially in tight spaces or at low speeds. If not addressed, it may result in further complications, such as complete steering failure.

What are the most common causes of P055C and how much does it cost to fix?

The most common causes of P055C include a faulty power steering pressure sensor, wiring issues, or low power steering fluid levels. Repair costs typically range from $150 to $300, depending on whether you need to replace the sensor or address wiring problems.

Can I drive my car with P055C or should I stop immediately?

While it may be possible to drive your car with the P055C code, it is not recommended. Issues with steering assist can make driving unsafe, particularly in emergency situations. It's best to have the problem inspected and resolved as soon as possible.

How can I diagnose P055C myself using GeekOBD APP?

Using the GeekOBD APP, perform a full OBD2 scan to identify the P055C code and any additional codes present. Pay attention to freeze frame data to understand the vehicle's conditions when the code was triggered. This information will help guide your troubleshooting process.

What vehicles are most commonly affected by P055C?

DTC P055C is frequently seen in vehicles like the 2010-2015 Ford Fusion, 2011-2016 Chevrolet Malibu, and 2013-2017 Nissan Altima. It's advisable to check for any recalls or technical service bulletins (TSBs) related to the power steering system for these models.

How can I prevent P055C from happening again?

Regular maintenance of your power steering system, including checking fluid levels and inspecting for leaks, can help prevent P055C from recurring. Additionally, keeping the wiring and connectors clean and free from corrosion is essential for reliable sensor performance.

What is P055C?

DTC P055C is a diagnostic trouble code that indicates a range or performance issue with the power steering pressure sensor. This sensor plays a crucial role in monitoring the hydraulic pressure in the power steering system, which helps the vehicle's electronic control unit (ECU) adjust the steering assist accordingly. When the sensor fails or gives incorrect readings, it can lead to issues such as hard steering, poor maneuverability, and a significant decrease in driver comfort. Commonly found in vehicles like the 2010-2015 Ford Fusion and the 2011-2016 Chevrolet Malibu, this code can trigger the check engine light, alerting drivers to a potential problem. Ignoring this code could lead to further damage in the steering system or even affect vehicle safety, as steering assist is vital for maintaining control. Therefore, addressing DTC P055C promptly is essential for ensuring safe and reliable vehicle operation.

System: P - Powertrain (Engine, Transmission, Emissions)

Symptoms

Common symptoms when P055C is present:

  • The check engine light remains on constantly, indicating an underlying issue with the power steering system.
  • Drivers may experience heavy or unresponsive steering, particularly at low speeds or when attempting to park.
  • Fuel economy may decrease significantly, as the engine works harder to compensate for steering difficulties, potentially dropping by 10-15%.
  • Unusual noises such as whining or groaning from the power steering pump may occur, especially during steering maneuvers.
  • A warning message may appear on the dashboard, indicating 'Power Steering Assist Fault' or similar alerts.

Possible Causes

Most common causes of P055C (ordered by frequency):

  1. The most common cause of P055C is a faulty power steering pressure sensor, which accounts for about 60% of cases. This sensor may wear out over time or get damaged due to leaks.
  2. Another frequent cause is wiring issues, where damaged or corroded wires lead to incorrect sensor readings. This issue is often exacerbated by exposure to moisture or road debris.
  3. A third potential cause could be a low power steering fluid level, which impacts sensor readings and system performance. Regular fluid checks can help prevent this.
  4. Less commonly, a malfunctioning power steering pump could create incorrect pressure readings, leading to this code. This usually manifests with noticeable performance issues.
  5. Rarely, software glitches in the vehicle’s ECU could trigger this code without any physical faults present, necessitating a software update or reset.

P055C Repair Costs

Cost Breakdown by Repair Type

Power Steering Pressure Sensor Replacement

Replacing the faulty power steering pressure sensor is often necessary to resolve the P055C code.

  • Total: $150 - $300
  • Success rate: 90%
Money-Saving Tips for P055C
  • 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 P055C Diagnosis Process

Follow these systematic steps to accurately diagnose P055C. 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 or loose connections in the power steering system (5-10 minutes)

Step 1: Initial visual inspection - Check for obvious signs like damaged wiring or loose connections 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 - Use the app to retrieve all codes and freeze frame data, providing context for the fault (10-15 minutes)

Step 2: OBD2 scan with GeekOBD APP - Use the app to retrieve all codes and freeze frame data, providing context for the fault (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 - Utilize a multimeter to test the power steering pressure sensor and its connections for proper voltage and resistance (20-30 minutes)

Step 3: Component testing - Utilize a multimeter to test the power steering pressure sensor and its connections for proper voltage and resistance (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 - After any repairs, verify the proper operation of the power steering system and clear the codes (10-15 minutes)

Step 4: System function test - After any repairs, verify the proper operation of the power steering system and clear the codes (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 the steering system works correctly and the code does not reappear (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm that the steering system works correctly 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: Power Steering Pressure Sensor Replacement on 2012 Ford Fusion

Vehicle: 2012 Ford Fusion, 85,000 miles

Problem: Customer reported heavy steering and persistent check engine light.

Diagnosis: After scanning with the GeekOBD APP, P055C was identified. Visual inspection revealed a damaged power steering pressure sensor.

Solution: Replaced the power steering pressure sensor and cleared the codes.

Cost: $220 (sensor: $150, labor: $70)

Result: Steering was restored to normal function, and the check engine light remained off after several test drives.

Case Study 2: Wiring Repair for P055C on 2014 Chevrolet Malibu

Vehicle: 2014 Chevrolet Malibu, 75,000 miles

Problem: Customer experienced intermittent power steering assist and check engine light.

Diagnosis: OBD2 scan showed P055C; further inspection revealed corroded wiring connectors.

Solution: Repaired the corroded wiring connections and verified sensor operation.

Cost: $180 (labor: $100, parts: $80 for connectors)

Result: Power steering assist was restored, and the issue did not recur.

Diagnose P055C

Use GeekOBD APP for professional diagnosis!

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  • Step-by-step repair guidance
  • Professional-grade analysis
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Code Information

Code: P055C
System: Powertrain (Engine, Transmission, Emissions)
Severity: HIGH
Category: Engine Codes