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If you have changed your egr valve and deleted the code and it still reads p0401 egr valve insuffasante flow what do you do now?
Wiki User
∙ 13y ago
You also need to clean the "passages". EGR valve puts exhaust gas back into the engine intake under less than full power situations. When that happens exhaust deposits build up on the walls of the passages. Replacing the EGR valve was only half the repair, you also need to clean it out.
There is a tube from under the EGR valve to the exhaust manifold. That is probably blocked.
Wiki User
∙ 13y ago
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