P055B - Power Steering Pressure Sensor Circuit Range/Performance Problem in Popular Makes like Ford and GM

Quick Answer

P055B means: DTC P055B indicates a problem with the power steering pressure sensor circuit.

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

Can I drive with P055B? It is recommended to address this issue as soon as possible to avoid steering difficulties.

Common Questions

What does P055B mean and how does it affect my car?

DTC P055B indicates that there is a problem with the power steering pressure sensor circuit. This affects the steering assist of your vehicle, making it harder to turn the steering wheel, especially at low speeds. If left unresolved, it can lead to more serious issues and higher repair costs.

What are the most common causes of P055B and how much does it cost to fix?

Common causes of P055B include a faulty power steering pressure sensor, damaged wiring, or low power steering fluid. Repair costs typically range from $150 for sensor replacement to $800 for a power steering pump replacement.

Can I drive my car with P055B or should I stop immediately?

While it may be possible to drive with P055B, it is not advisable due to potential steering difficulties. It is best to address the issue promptly to ensure safe driving conditions.

How can I diagnose P055B myself using GeekOBD APP?

Using the GeekOBD APP, you can perform an OBD2 scan to retrieve DTC codes. Look for P055B and examine any freeze frame data to understand when the issue occurred. The app can also help clear codes after repairs.

What vehicles are most commonly affected by P055B?

Vehicles frequently affected by P055B include the 2015-2018 Ford F-150, 2016-2019 Chevrolet Malibu, and other models from Ford and GM. Always check for any recalls or technical service bulletins (TSBs) related to power steering issues.

How can I prevent P055B from happening again?

To prevent DTC P055B, regularly check your power steering fluid levels, inspect wiring and connectors for wear, and have your power steering system serviced according to the manufacturer's maintenance schedule.

What is P055B?

Diagnostic Trouble Code (DTC) P055B indicates an issue with the power steering pressure sensor circuit, specifically related to range or performance. This sensor plays a crucial role in measuring the hydraulic pressure within the power steering system, which is essential for the steering assist feature in vehicles. When the power steering system operates efficiently, the driver experiences smooth and responsive steering. However, if the P055B code is triggered, it typically means that the electrical signal from the power steering pressure sensor is not within the expected range. This can lead to various real-world implications, such as increased steering effort and difficulties in maneuvering the vehicle, especially at low speeds. Common vehicle models that may experience this issue include the 2015-2018 Ford F-150 and the 2016-2019 Chevrolet Malibu. Ignoring this code can lead to further damage in the power steering system, increased wear on components, and ultimately, a higher repair bill. Therefore, understanding this code and addressing it promptly can save car owners time and money in the long run.

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

Symptoms

Common symptoms when P055B is present:

  • Check engine light stays on constantly, indicating a malfunction in the power steering system.
  • Steering feels heavier than usual, particularly during low-speed maneuvers, making it difficult to turn the wheel.
  • Unusual noises, such as whining or grinding, may occur when turning the steering wheel, indicating potential issues with the power steering pump.
  • Increased fuel consumption may be noticeable due to the engine working harder to assist the steering.
  • Fluid leaks under the vehicle might be visible, which can lead to further complications if not addressed promptly.

Possible Causes

Most common causes of P055B (ordered by frequency):

  1. The most common cause of DTC P055B is a faulty power steering pressure sensor, with about 60% likelihood. This sensor can wear out over time or experience electrical failures.
  2. Another potential cause could be damaged wiring or connectors in the power steering system, which may affect the sensor's performance. This can happen due to exposure to heat or moisture.
  3. A third cause is low power steering fluid levels, which can affect the system's performance and lead to inaccurate readings from the sensor. Regularly checking fluid levels can prevent this.
  4. Less common but serious causes include a malfunctioning power steering pump, which can lead to complete loss of power steering assist if not resolved.
  5. A rare cause might be a software issue in the vehicle's control module, which can misinterpret the sensor readings and trigger the code.

P055B Repair Costs

Cost Breakdown by Repair Type

Power Steering Pressure Sensor Replacement

Replacing the faulty sensor is often the most straightforward solution to resolve DTC P055B.

  • Total: $150 - $300
  • Success rate: 90%
Wiring Repair

If damaged wiring is found, repairing or replacing the affected wiring harness can resolve the issue.

  • Total: $100 - $200
  • Success rate: 80%
Power Steering Pump Replacement

In cases where the pump is malfunctioning, replacing it may be necessary.

  • Total: $400 - $800
  • Success rate: 85%
Money-Saving Tips for P055B
  • 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 P055B Diagnosis Process

Follow these systematic steps to accurately diagnose P055B. 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, ensuring that P055B is not related to other issues (10-15 minutes)

Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context, ensuring that P055B is not related to other issues (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 power steering pressure sensor and its electrical connections (20-30 minutes)

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the power steering pressure sensor and its electrical connections (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 repairs, verify proper operation of the power steering system and clear codes using the GeekOBD APP (10-15 minutes)

Step 4: System function test - After repairs, verify proper operation of the power steering system 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 that the steering feels normal and that the check engine light does not reappear (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm that the steering feels normal and that the check engine light 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 Sensor Replacement on 2016 Ford F-150

Vehicle: 2016 Ford F-150, 45,000 miles

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

Diagnosis: After scanning with the GeekOBD APP, we confirmed the presence of P055B. A visual inspection revealed a faulty power steering pressure sensor.

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

Cost: $220 (including parts and labor)

Result: Steering returned to normal; customer reported satisfaction with the repair.

Case Study 2: Wiring Repair on 2017 Chevrolet Malibu

Vehicle: 2017 Chevrolet Malibu, 30,000 miles

Problem: Customer noticed inconsistent power steering assist and check engine light.

Diagnosis: P055B was confirmed via OBD2 scan. Inspected wiring and found damaged connections.

Solution: Repaired the wiring and replaced a few connectors.

Cost: $150 (parts included)

Result: Steering assist was restored and the check engine light remained off.

Diagnose P055B

Use GeekOBD APP for professional diagnosis!

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  • Professional-grade analysis
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Code Information

Code: P055B
System: Powertrain (Engine, Transmission, Emissions)
Severity: HIGH
Category: Engine Codes