Posted on by lhl

The check engine light has been plaguing my GTI recently. I was getting a recurring 16795 - Secondary Air Inj. System Incorrect Flow Detected code and since I needed to get rid of it to pass emissions, I took it in to get it checked out (Renner Motor Sport, whom I’ve had previously good experiences with).

The fan unit itself seemed to check out ok, but after a couple of days, the light came back. So, I took it to the VW dealer down the street from work and apparently the combi valves are leaking… boo-urns.

It cost $92 for the checkup, but the $400+ for the part and $300+ for labor seemed a bit excessive. So, I’m going to be bringing it back to Renner (and run through the tests on my VAG-COM) to see if it might be something cheap to fix, to see for sure what’s leaking ) either with the vacuum lines, sealing the plastic, or replacing the valve itself w/o paying for a complete brand new fan unit. Also perhaps the air filter, although the ’96 and ’97 models had service bulletins on the combi-valve vacuum hose seating so it’s not all the surprising perhaps…