Question about 2002 Volkswagen Jetta TDI
I have an 02 Jetta the check engine light is on. I am told that I need to replace the Leak detection pump, the combination valve and the secondary air outlet hose. I dont mind doing the work myself however the Haynes manual that I have is sadly deficient. How do I replace these parts? Do I need special tools? Is the leak detection pump on the EVAP in the rear wheel well? Do I really need to replace these parts? How do I clear this code so that I can get a sticker?
SOURCE: check engine light just cam
The diagnostic code that relates to those causes are all from the emissions system and won't necessarily effect your vehicle performance, reliability, or it may still well be able to pass an emissions test.
The most likely of causes would be any rubber fittings, plastic or rubber hoses that have come loose or cracked over time. It is an easy and inexpensive replacement for any of those issues. The diagram for the vacuum hose routing can be found on a sticker placed under the hood, which includes all emissions components in the diagram.
If you cannot find any damage to the vacuum lines or fittings then I suggest having it inspected at a service center.
Keep in mind that both mileage and time limits for manufacturer warranty of emissions components extend beyond the other warranties and you still may be covered.
Posted on Feb 25, 2011
Double check the very small hose that comes off of the manifold, since it sits so close to the manifold, I would not be surprised to find it frail and broken.
If you have tried everything else, have you had the code cleared after you changed out the parts? try having it cleared again....
Posted on Aug 21, 2009
SOURCE: P0411 code 99 Passat
The secondary Air Injection system, this is basically an inspect and replace broken hose detail. Leave the inlet hose disconnected and start the engine. Listen and feel for exhaust hissing at the check valves.The check valve(s) will make like a gurgling sound as air is drawn in However , if exhaust is felt or heard replace the valve. Hope this works out for ya.
Posted on Mar 18, 2010
Bring the car into a repair shop and have them pressure test it for leaks or you can purchase a pressure tester make sure you get the appropriate adapter for your cars radiator filler neck or resovoir, and check for leaks yourself. Make sure the car is cold and there is the appropriate mixtiure of coolant and water in the system, prior to pressure testing. Also do a visual inspection of the cooling system when the vehicle is cold and look for leaks.
Posted on Apr 15, 2010
SOURCE: my check engine lite is
P0411 = Secondary Air Injection System Incorrect Flow.
Have some one check for a burnt out rubber blach rubber tubeing going to the valve from the motor. In 90% of the cars that cheap peice of hose was what caused the problem. Also check IAC and IAC circuit; check Secondary Air Injection pump, valve, circuit and hoses for leaks, blockages.
Hope helps; keep us updated.
Posted on Sep 02, 2010
the air pump is located on the engine towards the front of the vehicle and has apx. 3/4 diameter pipes running to and from it. it is apx. 2 fists in size and it is black plastic. one of the lines on top of the air pump runs to the other side of the engine towards the firewall. at the other end of that pipe is the valve. disconnect that pipe while the vehicle is running. no air out of the pipe means bad pump. air coming out of the pipe means bad valve
Posted on Feb 13, 2011
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