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P0521

Overview

Code

P0521

Code Type

P

Code Class

P0

System

Engine

Severity Level

Medium

Emissions Related

false

Drivability Impact

Minor

Diagnostic Protocol

OBD2

Freeze Frame Useful

true

Code Definition

Diagnostic trouble code P0521 indicates an engine oil pressure sensor range or performance issue

Symptoms

Intermittent oil warning light; Check Engine Light

Overview applies to this diagnostic code.

Affected Systems

On This Page

  • Code Definition

  • Symptoms

  • Affected Systems

  • Possible Causes

  • Diagnostic Steps

  • Drive Safety Notes​

More Resources

Oil pressure plausibility monitoring

Possible Causes

Sensor drift; Wiring issues

Diagnostic Steps

1 Compare sensor reading to mechanical gauge; 2 Inspect wiring; 3 Replace sensor if inaccurate

Drive Safety Notes

Incorrect oil pressure readings may mislead driver

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