Secondary Air System Flow Too Low

[eric]

i'm getting secondary air system codes on my 1998 528i. the codes are
>secondary air system Cyl. 4-6
>secondary air system Cyl. 1-3
i replaced the secondary air system pump and control valve reset the computer. it was ok for about 300 miles then the check engine light came back on. i tested it with the scanner and the same codes appeared. i'm in NYC where we had some bad weather recently. the temperature was at a freezing point for the past few months could that be the problem

can anyone help me out. what should i do first to check what could be the problem. i don't want to spend another $250 for a new pump just to see if this one works.

someone please help!!!

[njtech]

eric,
make sure the hose between the non return valve and pump is clear and not collapsed. When you changed the valve did you make sure there was no carbon buildup inside? HTH

Steve

[eric]

Originally posted by njtech@Mar 22 2005, 09:37 PM
eric,
make sure the hose between the non return valve and pump is clear and not collapsed. When you changed the valve did you make sure there was no carbon buildup inside? HTH

Steve

[snapback]316733[/snapback]

I did not check if there was carbon buildup inside the HTH what should i do know??