P0521 - Engine Oil Pressure Sensor/Switch Range/Performance

Engine oil pressure sensor reading is outside expected range.

Code first. Confirm symptoms and checks before pricing parts.

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

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Related OBD Codes

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Next Steps

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