Hi there guys, I have a quick question, is a tech article in changing the egr valve? A fault code 17831 and 17819 comes up when he plugs my car in the vag-comm. He also says that this might be the cause of the check engine light coming on. Thanks in advance guys for the help in this matter. And oh my catalyctic converters and O2 sensors has just been changed.

 

Engine? Model year? Help us help you.

 

Puts fresh air into the exhaust to burn off excess fuel in the exhaust as opposed to EGR recirculting exhaust to burn off excess fuel in the combustion chamber.

You need to test the whole system first. Using vag com run an output diagnostic test and see if the pump comes on.. If it doesn't then check the fuse.. huge one by the ECM. If hte fuse is ok.. take the line off the pump and water will proably come out if so then need a pump...


If pump runs you need to test if its still broken.. take off the outlet of the pump and put your hand on it. run test again and see if air comes out of hte sides... If so then you can replace it or drill out the rivets and put in long bolts.

If the pump runs, the housing is not leaking.. continue output test to chck solenoid for kombi valve.. If its clicking. then pull off the valve line and see if you can blow into it.. it should let you blow.. then not.. etc etc.. if it does thenits working.. check line ot kombi valve to make sure it its not cracked.

If the solenoid works and the pump works, and the vac line is ok. Check the Kombi valve itself.. Put a vacum hand pump on it.. If it doesn't hold vacum its bad.

If it does hold vacum.. put your hand on top of the valve.. and release the vacum you should feel the valve snap closed.

If you do not it may be jammed open or closed.. Take valve off and test again.. If it doesn't operate replace the valve..

 

Sorry guys, haven't logged on for a few days. thank you for the responses. My car is a 2000 2.8 atq engine, my mechanic has done the vacuum test and he says that its fine. I think that I do need to check the fuse though.Where is it located? How hard is it to replace the combi valve? Again thank you guys in advance.

 

also break all the time.

The fuse is located in the black box that holds the ECM.

 

Thank you guys for all the help that has been given in this forum. I will definitely check the fuse, the hoses has just been changed by my mechanic. Again, thank yhou to all.