P0523Medium urgency

Engine Oil Pressure Sensor/Switch High Input

Engine · Lubrication

⚠️ Diagnose before driving further — while often a sensor issue, you must verify actual oil pressure is not dangerously high and that the sensor is not masking a true reading.

What this means

The oil pressure sensor is reporting a voltage above its maximum specification — usually indicating a short to power in the sensor circuit or a failed sensor rather than genuinely dangerous oil pressure.

Likely causes

Failed oil pressure sensorMost common
Signal wire shorted to voltageCommon
Stuck-open oil pressure relief valveLess common

Estimated repair cost

Oil pressure sensor$20 – $80

Wiring repair$80 – $200

Oil pressure relief valve$50 – $200

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Frequently asked questions about P0523

What does P0523 mean?

Is P0523 serious?

Diagnose before driving further — while often a sensor issue, you must verify actual oil pressure is not dangerously high and that the sensor is not masking a true reading.

How much does it cost to fix P0523?

Repair costs for P0523 range from $20 – $80 depending on the root cause and your vehicle.

Can I drive with P0523?

You can drive short distances but should have it repaired within 1–2 weeks to prevent further damage.

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