Code help - 17832 Secondary Air Injection

[bolwin1]

I have the following DTCs:

17832 P1424 Sec.Air Inj.Sys.,Bank1 Leak Detected
17584 P1176 O2 Correction Behind Catalyst,B1 Limit Attained
16804 P042 (intermittent)Catalyst System,Bank1 Efficiency Below Threshold

I know the exhaust codes have to do with my O2 sensors and high flow cat, so I'm not worried about them, but I am getting some hesitation after initial spool-up that I associate with the 17832 code.

Any ideas one what potentially faulty parts are associated with 17832? I'm leaning toward my J valve or MAF..

Also, my mileage is just terrible and has been for about 6 months.

[Too Cold NB1.8T]

For the P1424 You may want to check the SAIP, Combi Valve and all related hoses for leaks and proper operation.

The P0420 code is likely indicating that your catalytic converter is bad, the P1176 is likely the result of a bad converter and is probably telling you that the O2 sensor(s) have reach their limit in terms of correcting the problem and it's not enough, or one or both sensors might be bad as well.

[bolwin1]

Where is the SAIP?

[Too Cold NB1.8T]

The (SAIP) Secondary Air Injection Pump is a black plastic unit which is normally located below the intake manifold toward the left (driver side) of the cylinder head, the Combi Valve (which can also fail) is on the same side but further back toward the firewall at the end of the cylinder head.

The SAIP and Combi Valve are connected via one of the two black plastic hoses while the second plastic hose goes from the SAIP to the airbox, these hose can leak and cause problems as well, the SAIP is what you hear running/whining for a minute or so when you first start your car in the morning.

This is an emissions device that injects oxygen into the exhaust system on first starts in order to insite a cleaner burn.

[bolwin1]

Thanks a bunch. I'll check them out.