P0520 - Oil Pressure Sensor Circuit Malfunction in Common Vehicles Like Ford and Honda

Quick Answer

P0520 means: P0520 refers to a malfunction in the oil pressure sensor circuit, which can lead to engine lubrication issues.

Fix: Check and replace faulty components Cost: $100 - $300 Time: 90-180 minutes

Can I drive with P0520? Immediate attention is recommended to prevent potential engine damage.

Common Questions

What does P0520 mean and how does it affect my car?

The P0520 code indicates a problem with the oil pressure sensor circuit. This can lead to low oil pressure, which may cause your engine to run poorly or even sustain significant damage if not addressed quickly. It's crucial to monitor your engine performance and check your oil levels regularly.

What are the most common causes of P0520 and how much does it cost to fix?

Common causes of the P0520 code include a faulty oil pressure sensor, damaged wiring, or low oil levels. Repair costs can vary, with sensor replacement typically costing between $100 and $300, while wiring repairs might run between $50 and $150.

Can I drive my car with P0520 or should I stop immediately?

It's advised to stop driving your vehicle if the P0520 code appears, as continuing to operate it could result in serious engine damage due to low oil pressure. Always prioritize safety and have the issue diagnosed as soon as possible.

How can I diagnose P0520 myself using GeekOBD APP?

To diagnose P0520 using the GeekOBD APP, start by scanning your vehicle for trouble codes. Look for P0520 and any related codes. Review the freeze frame data for context, and perform a visual inspection of the oil pressure sensor and wiring. The app can guide you through testing components as well.

What vehicles are most commonly affected by P0520?

The P0520 code is frequently seen in various models such as the 2015-2019 Ford F-150, 2016-2018 Honda Civic, and select models from Chevrolet and Toyota. Always check for specific recalls or technical service bulletins (TSBs) related to your vehicle's make and model.

How can I prevent P0520 from happening again?

To prevent P0520 from recurring, regularly check your oil levels and change the oil according to your vehicle's maintenance schedule. Additionally, inspect wiring and connectors for damage during routine maintenance.

What is P0520?

The Diagnostic Trouble Code (DTC) P0520 indicates an issue with the oil pressure sensor circuit. This sensor plays a vital role in ensuring your engine runs smoothly. It monitors the engine oil pressure and sends this information to the Engine Control Module (ECM). When the ECM receives a signal that the oil pressure is either too low or too high, it triggers the P0520 code. Ignoring this code can lead to severe engine damage because low oil pressure can cause insufficient lubrication, leading to increased friction and overheating. Common symptoms associated with P0520 include the check engine light illuminating on your dashboard, engine performance issues such as stalling or hesitation, and even potential engine damage if not resolved quickly. It's essential to act promptly upon receiving this code to avoid costly repairs. This issue is commonly found in various makes and models, including the 2015-2019 Ford F-150 and the 2016-2018 Honda Civic, highlighting the importance of regular maintenance and diagnostic checks.

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

Symptoms

Common symptoms when P0520 is present:

  • Check engine light stays on constantly, indicating a persistent fault in the oil pressure sensor or circuit.
  • Engine hesitates during acceleration, leading to a noticeable lack of power or responsiveness when you press the gas pedal.
  • Fuel economy decreased by 10-15%, as the engine struggles to maintain optimal performance due to oil pressure issues.
  • Unusual engine noises, such as knocking sounds, which can indicate insufficient lubrication due to low oil pressure.
  • Oil pressure warning light activates on the dashboard, alerting you to potential oil pressure issues that need immediate investigation.

Possible Causes

Most common causes of P0520 (ordered by frequency):

  1. Faulty oil pressure sensor (60% likelihood) - A common issue where the sensor itself fails, leading to incorrect readings.
  2. Damaged wiring or connectors in the oil pressure circuit (25% likelihood) - Corrosion or wear can disrupt the signal sent to the ECM.
  3. Low oil levels or dirty oil (10% likelihood) - Insufficient oil can cause low pressure, which may trigger the P0520 code.
  4. Oil pump failure (3% likelihood) - A rare but serious cause where the oil pump becomes inoperative, leading to critical engine damage.
  5. Engine control module (ECM) issues (2% likelihood) - Though uncommon, a malfunctioning ECM can misinterpret sensor data, resulting in a false P0520 code.

P0520 Repair Costs

Cost Breakdown by Repair Type

Oil Pressure Sensor Replacement

Replacing the faulty oil pressure sensor to restore proper oil pressure readings.

  • Total: $100 - $300
  • Success rate: 90%
Wiring Repair

Repairing or replacing damaged wiring in the oil pressure circuit.

  • Total: $50 - $150
  • Success rate: 85%
Oil Change Service

Performing an oil change and replacing the oil filter if necessary.

  • Total: $30 - $100
  • Success rate: 95%
Money-Saving Tips for P0520
  • 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 P0520 Diagnosis Process

Follow these systematic steps to accurately diagnose P0520. 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 (5-10 minutes)

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

Step 2: OBD2 scan with GeekOBD APP - Retrieve all codes and freeze frame data to understand the fault context (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 oil pressure sensor and wiring (20-30 minutes)

Step 3: Component testing - Use a multimeter or specific diagnostic tools to test the oil pressure sensor and wiring (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 proper operation after repairs and clear codes using the GeekOBD APP (10-15 minutes)

Step 4: System function test - Verify proper operation after repairs 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 repair success and monitor for any recurring codes (15-20 minutes)

Step 5: Road test verification - Drive the vehicle under various conditions to confirm repair success and monitor for any recurring codes (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: Oil Pressure Sensor Replacement in a 2017 Ford F-150

Vehicle: 2017 Ford F-150, 65,000 miles

Problem: Customer reported a persistent check engine light and engine hesitation.

Diagnosis: Using the GeekOBD APP, retrieved P0520 code. Visual inspection showed corroded wiring leading to the oil pressure sensor.

Solution: Replaced the oil pressure sensor and repaired the damaged wiring.

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

Result: Customer noted improved engine performance and no return of the check engine light.

Case Study 2: Wiring Repair on a 2016 Honda Civic

Vehicle: 2016 Honda Civic, 45,000 miles

Problem: Check engine light illuminated, and oil pressure warning light activated.

Diagnosis: Diagnostic scan revealed P0520. Inspection confirmed wiring damage due to wear.

Solution: Repaired the wiring harness and cleared the fault codes.

Cost: $120 (repair parts $20, labor $100)

Result: After the repair, the check engine and oil pressure lights remained off, and the vehicle operated smoothly.

Diagnose P0520

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: P0520
System: Powertrain (Engine, Transmission, Emissions)
Severity: HIGH
Category: Engine Codes