For Shop Owners

P0521 CHEVROLET - Engine Oil Pressure Sensor/Switch Circuit Range/Performance

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3 What does this mean?

Possible causes

  • Low oil level or motor mechanical fault
  • Faulty oil pressure sensor
  • Oil Pressure Sensor harness is open or shorted
  • Oil Pressure Sensor circuit poor electrical connection
What does this mean?

Tech notes

There is a factory service bulletin for the following Chevrolet models:

2010 Chevrolet Camaro SS
2007-2010 Chevrolet Avalanche
2007-2010 Chevrolet Silverado
2007-2010 Chevrolet Suburban
2007-2010 Chevrolet Tahoe
2007-2009 Chevrolet Impala
2005-2009 Chevrolet Trailblazer
2007 Chevrolet Monte Carlo

What does this mean?

When is the code detected?

The P0521 is detected when the signal sent from oil pressure sensor to PCM goes out of range.

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Oil pressure warning light ON.

P0521 CHEVROLET Description

The PCM continuously monitors the engine oil pressure. The Oil Pressure Sensor/Switch sends a signal to the PCM when the engine is running.
OBDII Code P0521 Chevrolet - Engine Oil Pressure Sensor/Switch Circuit Range/Performance -

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P0521 CHEVROLET Comments

Help us improve Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the P0521 Chevrolet code? Have you replaced any parts?
Any information is appreciated. Thanks
Repair Importance Level: 3
1=Low 2=Medium 3=High
Repair Difficulty Level: 3
1=Easy 2=Moderate 3=Hard

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Posted and Edit by 06-14-2015

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