I am getting a recurring P0410 DTC. I have inspected the pump along with the AIR shut-off valves, vacumn lines and vacumn control solenoid. The pump housing is very suspect - I can almost pull it apart with my hands. And when it is operating, it has a very loud high-pitched whine. More than likely, I'm going to order and replace the pump. You mentioned that the pump is likely being told to come on by the PCM. From what I've read it should only come on during a cold engine start to reduce start up emissions. What would cause the PCM to tell the pump to come on after the engine is warm and the car is moving? I know more than likely the pump is part of the problem. I would just like to be sure the PCM or some sensor isn't at fault and telling the pump to come on when it shouldn't. Thanks.
Sunday, April 12th, 2009 AT 11:09 AM