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P0452

P0452 - EVAP Control System Pressure Sensor Low Input

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Possible causes
- Faulty Evaporative Emission System (EVAP) Pressure sensor
- Evaporative Emission System (EVAP) Pressure sensor harness is open or shorted
- Evaporative Emission System (EVAP) Pressure sensor circuit poor electrical connection
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Tech notes
If there are no loose or broken hoses on the EVAP canister, and the gas cap is firmly tight, replaced the EVAP Control System Pressure Sensor to repair the problem.
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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 Description
The Evaporative Emission System (EVAP) control system pressure sensor detects pressure in the purge line. The sensor output voltage to the Engine Control Module (ECM) increases as pressure increases. The EVAP control system pressure sensor is not used to control the engine system. It is used only for on board diagnosis.
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