Secondary Air Code - Exhaust Smell

[anerbe]

Hello Group,

I've been getting an exhaust smell from under the hood, which moves into the HVAC intakes of the car, so I can smell it thru my cabin air. I also can hear an exhaust style ticking from the car.

When I immediately start the car cold, I can feel hot air moving on the drivers side of the plenum, between the exhaust headers and the plenum.

I had a shop replace my exhaust manifold gaskets already, but the problem still exists.

A code was thrown from my car: 27B2 - Secondary air system throughput main section.

I know there are different codes for the secondary air system - is there any feedback on whether this could be a hose section or a valve? I have to take apart the plenum anyways due to TA error, which I will replace them, so I'm hoping I can address this issue at the same time.

If it's one of the valves, could I code out the system to deactivate?

I may start the car with the plenum removed, so I can try to trace the secondary air system for any leaks. Any feedback before I dive into this would be greatly appreciated.

Thank you!

[roastbeef]

I'm not super familiar with it, but you might have a simple hose that's jacked up. Check the low hanging fruit like the plug on the back right (standing at the bumper, looking at the engine) side of the plenum.

[MikeBlaszczak]

Did you get anywhere diagnosing the 27B2 code? I've got the code sometimes, but it never causes a CEL, or low power. I do have a bit of a rough idle (a little hunting) at cold start.