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P0440???

This is a discussion on P0440??? within the Computer & Tuning forums, part of the LSx Technical Help Section category; Can anyone tell me why I keep getting this code and how can I fix it?...

  1. #1
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    P0440???

    Can anyone tell me why I keep getting this code and how can I fix it?

  2. #2
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    Want a new car

    P0440 Evaporative Emission Control System

    EVAP

    Evaporative emissions from the fuel system (fuel vapors) are trapped and store in a charcoal canister. Later, a purge valve opens allowing the vapors to be sucked into the engine and reburned. The EVAP system usually requires no maintenance. The fuel filler cap is also part of the EVAP system, and is designed to keep fuel vapors from escaping into the atmosphere. A leaky or missing fuel filler cap may cause a vehicle to fail an emissions test.

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