I have a PZEV (Partial zero emission vehicle) 2006 Focus. Recently, my car threw the check engine light. Looked at the two codes, found out it was for the secondary air system. I pulled the car apart, removed the pump, checked that the pump was indeed receiving 12v (checked with a multimeter) with ignition-on-engine-off. I couldn’t feel, or hear, the pump spinning. Figuring it was the source of the problem (as opposed to a clogged hose), I replaced the relay, thinking that perhaps it was on its dying leg. That didn’t help. I next replaced the pump, which also didn’t help. To tell you the truth, I can’t even hear or feel the new pump running with ignition-on-engine-off.
I “reset” the codes, or so I thought, by disconnecting my battery for quite a few minutes. During the first startup, the check engine light isn’t on. Starting up again though later in the day, the light returns. The engine does run a bit rough when cold without the pump malfunctioning for the first few brief moments.
Anyone have any similar issues or insight? Is the pump supposed to be powered and running for the entire time ignition-on-engine-off (I assume so since it is receiving 12v). How loud should these guys be? I would have thought I would be able to feel the motor spinning or hear something…