Possible causes
– Faulty Fuel Tank Pressure Sensor
– Fuel Tank Pressure Sensor harness is open or shorted
– Fuel Tank Pressure Sensor circuit poor electrical connection
– Fuel Tank Pressure Sensor harness is open or shorted
– Fuel Tank Pressure Sensor circuit poor electrical connection
Tech notes
On most Chevrolet vehicles the sensor is on top of the fuel tank.
When is the code detected?
An excessively low voltage from the sensor is sent to Engine Control Module (ECM).
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P0452 CHEVROLET Description
The fuel tank pressure sensor responds to changes in fuel tank pressure. Vacuum is consider negative pressure. The information supplied by the fuel tank pressure sensor to the Engine Control Module (ECM) is used in order to detect vacuum decay or an excessive vacuum during the EVAP diagnostic routine.
The fuel tank pressure sensor signal voltage to VCM varies from a minimum of about 0.1 volts with pressure in the fuel tnk to greater than 4.0 volts with high vacuum in fuel tank.
The fuel tank pressure sensor signal voltage to VCM varies from a minimum of about 0.1 volts with pressure in the fuel tnk to greater than 4.0 volts with high vacuum in fuel tank.
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CHEVROLET Technical Service Bulletins for P0452 code
2009 CHEVROLET COBALT ENGINE AND ENGINE COOLING:ENGINE
2009 CHEVROLET COBALT FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES
2009 CHEVROLET COBALT ELECTRICAL SYSTEM
2009 CHEVROLET COLORADO ENGINE AND ENGINE COOLING:ENGINE
2009 CHEVROLET COLORADO FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES
2009 CHEVROLET COLORADO ELECTRICAL SYSTEM
2009 CHEVROLET SILVERADO ENGINE AND ENGINE COOLING:ENGINE
2009 CHEVROLET SILVERADO FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES
2009 CHEVROLET SILVERADO ELECTRICAL SYSTEM
2010 CHEVROLET COBALT ENGINE AND ENGINE COOLING:ENGINE