Question about 2003 Chevrolet Silverado 1500

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I have a check engine light on my 2003 chevy truck it reads PO445

What can i do to fix the problem, somebody told me to look into the egr vavle.

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  • monfortcody Feb 10, 2009

    yes they said PO445

  • Jeremy Reddick
    Jeremy Reddick May 11, 2010

    have you got the code read yet?



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P0445 Evaporative Emission Control System Purge Control Valve Circuit Shorted
The Evaporative Emissions System (EVAP) allows fumes from the gas tank to enter the engine to be burned, rather than vented into the atmosphere as an emission. The purge valve solenoid is supplied switched battery voltage. The ECM controls the valve by operating the ground circuit, opening the purge valve at specific times allowing these gasses to enter the engine. The ECM monitors the ground circuit as well, watching for faults. When the purge solenoid isn't activated, the ECM should see a high voltage on the ground circuit. When the solenoid is activated, the ECM should see the ground voltage pulled low, close to zero. If the ECM doesn't see these expected voltages, or senses an open in the circuit, this code is set.
Hope this helps

Posted on Feb 10, 2009


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