P0521 CHEVROLET - Engine Oil Pressure Sensor/Switch Circuit Range/Performance
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
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 Chevrolet Factory Service Bulletin OBDII Code P0521
When is the code detected?
The P0521 is detected when the signal sent from oil pressure sensor to PCM goes out of range.
Engine Light ON (or Service Engine Soon Warning Light)
Oil pressure warning light ON.
P0521 Chevrolet Description
continuously monitors the engine oil pressure. The Oil Pressure Sensor/Switch sends a signal to the PCM
when the engine is running.