Technical Definition:

Evaporative Emission System Pressure Sensor/Switch Low

Trouble Code: P0452
Address: 0x0452
System: Powertrain
Technical Description:

Possible Causes:
  • Failed fuel tank pressure sensor
  • Harness to the sensor has an open or short circuit
  • Faulty electrical connection to the FTP sensor
  • Cracked or broken vapor line to the vacuum canister
  • Cracked or broken positive vapor line to the tank
  • Plugged line
  • Leaky gasket at the fuel pump module
  • Gas cap left loose resulting in a loss of vacuum
  • Pinched vapor line

Possible Symptoms:

Evaporative Emission Control System Pressure Sensor Low Input

Possible Solutions:

OBD-II Trouble Code Type:

Diagnostic Step:

Tech Notes:

– 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

Specific Makes:

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