In this video we will be cover all the necessary testing procedures for trouble code P0452 "EVAP Pressure Sensor Signal Low/Short". The vehicle in test is a 2002 Chevy Silverado 4.8 but these same procedures can be followed on all General Motors fuel tank pressure sensors as well as every other pressure sensor on the car. Including MAP and BARO sensors.

Engine Performance Diagnostics chapter 8

symptoms 50

  • check engine light with a P0452 code

fix 50

  • replace faulty fuel tank pressure sensor

test shown enh 50

  • pressure sensor description, operation and testing
  • how to perform a signal circuit integrity test (chapter 10)
  • voltage measurements of the tank pressure sensor

Tools used

  • scan tool
  • digital multimeter
  • back-probing pins

end faq

Playlist

(Chapter 8) Pressure Sensor Testing, MAP, BARO, DPFE, fuel tank and rail pressure sensors

Related videos:

Power Steering Pressure Sensor Test (P0550) - Toyota:

Ford Ranger EGR Flow Trouble Code P0401 (DPFE fault):

No Start from a shorted MAP sensor (Honda, Acura):

end faq


For more information on this topic, I have written a “field manual” called Engine Performance Diagnostics which is available as an eBook or paper book.

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