Trouble Code 0452

Discussion in 'Chevy Silverado Forum (GMC Sierra)' started by trapper_canada, Nov 5, 2009.

  1. Does anyone have an idea of what to look for?

    The "generic" code says Evaporative Emission Control System - Pressure Sensor Low Input

    That means nuthin to me ... :rofl:

    Any ideas what I should look for? Is this a big deal?
     
  2. desertduck

    desertduck New Member

    I looked at an OBD II site, that code appears to relate to fuel pump issues. Here's a link to the site

    http://www.obd-codes.com/
     
  3. Jimmiee

    Jimmiee Epic Member 5+ Years 1000 Posts

    You tank has a pressure sensor so the PCM knows when to vent the hydrocarbons. Also the sensor is used to test the tank for any leakage. The testing is often done when the truck is shut off by the way. Common causes are a loose gas cap, bad gas cap, loose hoses, leaks of any kind. If the PCM detects a low input reading from the sensor it sets this code.
     
  4. Thanks guys... I'll look into it.
     

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