Sporadically getting a CEL caused by code P1411 "Secondary Air Injection System, Bank 2 – Below Limit". It has been coming up more frequently over time... I now get it about every 5th "drive" and it is now impacting my ability to pass smog as the readiness monitors all reset each time I receive a CEL.

What seems to be unique in my situation (and likely a clue to its resolution) is that I do not get code P0410 (bank 1) as almost everyone else reports.

P1411 Secondary Air Injection System, Bank 2 – Below Limit
Possible cause:
- Secondary air injection pump is not triggered
- Secondary air injection pump does not function
- Air supply lines restricted
- Electric change-over valve does not function
- Air change-over valve does not function
- Vacuum system leaking

Here is the diagram of the air injection system -

http://www.autoatlanta.com/porsche-p...section=108-05

I've done -

• Replaced DV's
• Determined the air injection pump is running
• Found and fixed several vacuum leaks / torn rubber hoses, etc
• Replaced Cycle and Change over valves

What lines go to Bank 2 in the diagram?
Any other suggestions also much appreciated!?!

 

Do a full system pressure test.

 

Thanks, agreed. A full system pressure test is likely in order. Will do so and report back...