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How do you repair an evaporative emission control system leak?

Answer:

In many cases the fuel cap is at fault, or a cracked vapor/vacuum hose.

Contributor:

Rdrsh

First answer by Pop Rivet. Last edit by Rdrsh. Contributor trust: 857 [recommend contributor ]. Question popularity: 2 [recommend question].

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What is an evaporative emission system leak?
It is a vapor leak in the fuel system. Starting in 1996 vehicles check for leaks down to .020 inch.
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Try the gas cap...Look for any cracked hoses between the fuel tank and engine.
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http://www.obd-codes.com/p0440
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