P0451

2017-10-10

Description:

  • The fault code P0451 indicates that there is an issue with the range or performance of the pressure sensor in the vehicle's evaporative emission control system. This system is responsible for capturing and storing fuel vapors before they can escape into the atmosphere.

Possible Symptoms:

  • Illuminated check engine light

  • Failed emissions test

  • Fuel smell near the vehicle

  • Decreased fuel efficiency

Possible Causes:

  • Faulty evaporative emission control system pressure sensor

  • Wiring or connections in the circuit are damaged or corroded

  • A leak in the evaporative emission control system

  • The purge or vent solenoid is stuck open or closed

  • Failed engine control module (ECM)

Related Parts:

  • Evaporative Emission (EVAP) Pressure Sensor: The EVAP system prevents petrol vapors from escaping into the atmosphere from the fuel tank and fuel system. The pressure sensor monitors the pressure in the EVAP system. Problems in this car's flow valve will lead to fuel loss

Possible Solutions:

  • Replace the evaporative emission control system pressure sensor

  • Check and repair any damaged or corroded wiring or connections in the circuit

  • Locate and repair any leaks in the evaporative emission control system

  • Replace the purge or vent solenoid if necessary

  • Replace the engine control module (ECM) if necessary

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