my 2005 2.5 jetta has been throwing this code (P0413) Secondary Air Injection Solenoid Circuit A open.
I have done research about it but, no luck on the issue yet.. I did replace the air connections(hoses) pretty much most of them since they were ripped/cracked. I just replaced the N80 valve, (purge valve). replaced the EGR valve N112, I noticed the air pump was not on, unsure if it works, I removed the hose that goes from the pump to the EGR to "see" if air was being pumped out, I felt none, or maybe I did no wait long enough. I also replaced the diphagram inside the PVC intake as this was ripped. I read about the N249 valve but I'm unsure it will be the problem or the location of such. My tags expired and the car will not pass emmision test becuse of this, has anybody else experience the same problem? any insights will be much appreciated..
"circuit" codes usually are referring to electrical.
For example: On your EGR system there is an upstream and downstream pressure sensor. If the computer opens the EGR valve and doesn't see a change in pressure you'll get a code that indicates one or the other (or both) pressures are wrong. What you won't see is an "EGR circuit open". By the same token, if the computer tries to open the EGR valve and doesn't see proper current flow it will throw an "EGR circuit open" code, and may or may not throw a pressure code.
In this case, it appears the computer isn't sensing proper current flow through the solenoid, so it throws a "open circuit" code. You should start at the solenoid and ohm it out for proper resistance. If it's good, you can disconnect the connector and ohm across the pins to ensure you are getting proper resistance.
Thank you for your help, it is much appreciated.
I have been doing research on the solenoid but can't seem to find anything related to that specifically.
By solenoid you mean the secondary air solenoid valve N112 valve (kombi valve) or is it other solenoid. and if it is another solenoid where is it located? or the part number? I'm sorry if my response creates frustration, I'm still learning about Jettas, Now, If the EGR valve does not senses a proper air flow, could if be a faulty air pump? This code if becoming an issue as it is difficult to come across information on the subject. Anyhow, Could you elaborate further.
I don't know anything about your specific vehicle. Mine is a 1984. I just know a little bit about how codes work. I wish I could direct you better. I wasn't trying to imply that your EGR system has an issue...was just using that for an example. My guess would be that whatever valve is named by the code would be the place to start. Disconnect the wires at the valve and ohm across it. If it's good (most solenoid valves run around 10-50 ohms) then reconnect it and disconnect the connector at the other end of the harness (computer end) and ohm across the two wires to the valve to verify you have good connection.
Hi, Yes, I have read about that test, which I did performed. As I blow the N112 is closed which might indicate it is working properly. I have (2) N112 valves since I replaced it. At this point I believe the air pump is not working or the correspondent relay. Knowing my luck it will be the most expensive thing. I would like to pinpoint the part or the cause to avoid unnecessary expenses.
thanks for the pix, I appreciate the help..