Just bought a 1997 850 GLT - 110k miles. Check engine light came on yesterday, code read was "Secondary Air Injection System Malfunction" - don't remember the code #. Any ideas what the likely problems are?

Thanks,

 

Could be a bad air pump or valve on the back of the engine.Look under the battery tray and you will see the pump.Check it and see if battery acid ate it up.You might have to remove the splash pan if it is still there.That will help you see the bottom.The pump also gets water in it sometimes.

 

I pulled the battery, and there appears to be a pump attached to the bottom of the battery tray - it had a couple of small hoses attached to it. It did not appear to be damaged/corroded. Did I find the right part? Any way to test it?

 

That pump is the cruise control pump.The air pump is further down .

 

Thought that was the case. The good news is that pulling the battery cleared the code and it has not recurred. Any reason I should be concerned unless the fault occurs again?

Thanks for your help,

 

I wouldn't worry about it till it comes on again.

 

Check Engine finally came back on - Volvo dealer said I need to replace the air pump and the air pump check valve. The air pump is under the battery (per your previous posts). Is the check valve in the same general area as the air pump? Pictures of the parts on the internet look fairly simple to replace. Am I being overly optimistic?

Thanks for your help

 

The air pump check valve is located on the back of the engine.By the top of the engine.It is bolted to a metal pipe and has 2 hoses going to it.

 

I have a 94 850 ,140,000 I am experiencing check engine light on as well,just yesterday I removed the throtle cover on front of the engine to lubricate and clean the thretle cable .I just happen to notice a t vacuum with multiple rubber elbow ,2 of them were completely rotted into,I took them off and replaced them 1 had a number 11 and 1 had a number 25 on them,2 different sizes.I live 1 hour from a local volvo dealer ,so I purchase 1 ft of each from a local auto suppl for 90cents.This may not be the problem but anything is worth a try to save money.I have checked other vacuum lines and they appear to be ok.I still have check engine light on .I disconnected battery for 30 minutes . and attempted the 1-5-1 reset under the hood .I hope the check engine light goes off .I may try the 60mph 10 mile idle 1 minute,and again to see if that will reset the check engine light.

 

What was the original code you pulled?

 

Did you get he check engine light to go out......How did you do it? I have 95 850 with same problem.

 

See your other post

 

I am Spencer's dad following up...

To make a long story short - We found the rubber elbow on the small fitting of the air pump control valve to be almost completely rotted away. We replaced it and cleared the codes by disconnecting the battery (on Saturday morning). The check engine light remains off. Would this have caused codes (442 and 448) to set? Is there a way to test the theory before I return the air pump and air pump control valve?

Thanks,

 

It could possibly have set the code because the system wasn't working because of the loss of vaccum.
The air pump starts everytime when the car sits for a long period of time like overnight or all day.

If I remember correctly it might need to see the fault 3 times before it will set the light.

At the dealer we would use the scann tool and activate it to make sure it is working properly.