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

{accordionfaq faqid=accordion15 faqclass="dotluvfaq help2 aligncenter headerbackground headerborder contentbackground contentborder round7" active=item0}


(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

{accordionfaq faqid=accordion3 faqclass="darkhivefaq defaulticon headerbackground headerborder contentbackground contentborder round5" active=item0}

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.

Want even more diagnostic training? Whether you are a DIY trying to fix your own car, someone looking to become an auto technician, or a current auto technician that wants to get more into diagnostics, subscribe to ScannerDanner Premium. There is a 14 day free trial.

On ScannerDanner Premium I will bring you right into my classroom at Rosedale Technical College. You will find page for page lectures taken right from my book as well as exclusive classroom type case studies. What is so special about these classroom case studies? I pull live problem vehicles directly into my classroom and we troubleshoot them in real time, using and applying the theory and testing procedures we learn during the classroom lectures. There is no better on-line training of how to troubleshoot automotive electrical and electronics systems anywhere!