P0521 - Engine Oil Pressure Sensor/Switch Range/Performance

Engine oil pressure sensor reading is outside expected range.

Code Overview

Engine oil pressure sensor reading is outside expected range.

Common Causes

• Faulty oil pressure sensor
• Low oil pressure
• Restricted oil passages
• Wiring issue

Diagnostic Steps

1. Check oil level and oil condition
2. Inspect sensor and connector
3. Verify pressure with a mechanical gauge if needed
4. Check for engine noise or low-pressure warning

Likely Repairs & Cost Guides

Use test results to confirm the fault before pricing the repair.

Related OBD Codes

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Next Steps

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