2006 Volvo S40 2.4L with code P2420, what causes this code to come ON?

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Carguy1 · Answer 1 · 2019-01-28T17:02:10+0000

Hi there,

This code indicates an issue with the leak diagnostic unit valve. Here is some info for you.

P2420 VOLVO - Leak Diagnostic Unit Valve Signal Too High

Read more: https://www.autocodes.com/p2420_volvo.html