What causes the P0520 code?

Faulty oil pressure switch; Incorrect oil viscosity; Clogged oil filter.

How to fix the P0520 code?

Replace the oil pressure switch (it is a cheap and common failure). Ensure you are using the correct Fiat-spec SELENIA oil or equivalent 5W-30 / 5W-40.

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Fiat / FCA

🟡 Medium

P0520

FIAT FIAT Oil Pressure Sensor Circuit

The P0520 fault on your Fiat / FCA indicates a FIAT FIAT Oil Pressure Sensor Circuit. Your Fiat / FCA has registered an anomaly during a diagnostic self-test, indicating the system is struggling to reach its target operating range.

Brand

Fiat / FCA

Fault Code

P0520

Severity

🟡 Medium

Models

500, Punto, Bravo, Alfa 147/156/159, Doblo, Ducato

🛠️ Diagnostic Overview

Difficulty Level

🛠️🛠️ Medium (Moderate)

Estimated Time

⏱️ 1-2 Hours

🧰 Required Tools

✓ Socket Wrench & Hand Tools

⚠️ Possible Causes

• Faulty oil pressure switch
• Incorrect oil viscosity
• Clogged oil filter.

🔧 Recommended Fixes

→ Replace the oil pressure switch (it is a cheap and common failure). Ensure you are using the correct Fiat-spec SELENIA oil or equivalent 5W-30 / 5W-40.

🚗 Commonly Affected Vehicles