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P0451 FORD - Evaporative Emission Control System Pressure Sensor Range/Performance

Repair Importance Level: 1/3
Repair Difficulty Level: 3/3 What does this mean?
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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
  • Faulty Engine Control Module (ECM)
What does this mean?

Tech notes

There is a factory service bulletin for the following Ford models:

2005-2008 Ford Escape

What does this mean?

When is the code detected?

An improper voltage signal from EVAP control system pressure sensor is sent to Engine Control Module (ECM).

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P0451 FORD 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.
OBDII Code P0451 Ford - Evaporative Emission Control System Pressure Sensor Range/Performance -

P0451 FORD Information for specific Ford models

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P0451 FORD Comments

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Any information is appreciated. Thanks
Repair Importance Level: 1
1=Low 2=Medium 3=High
Repair Difficulty Level: 3
1=Easy 2=Moderate 3=Hard

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