Originally Posted by AndreyT
While I don't know what "You door here the pump..." is supposed to mean, it is still not the DMTL pump that you hear when the car wakes up.
What he meant is that if you "don't hear" a whistling sound coming from the driver's rear of your car and you get those codes, that means your pump is not pumping. The whistling sound is the pump and NOT the amp as others have mentioned in other threads. I hear this sound when i shut off the car. The pump might be on too when i start the car but i wouldn't be able to hear it with the exhuast running as well.