Check engine light
#1
#2
RE: Check engine light
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.
#3
#5
#7
RE: Check engine light
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
Thanks for your help
#8
#9
RE: Check engine light
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.
#12
#13
RE: Check engine light
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,
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,
#14
RE: Check engine light
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.
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.
Thread
Thread Starter
Forum
Replies
Last Post
ErnstlS90
Volvo S90 & V90
4
10-23-2008 08:37 AM