saying secondary air flow sensor but we cant power point where the problem is just replaced mass air under the intake but still getting the cel. anyone help any answers may help and im new here just bought my audi 2000 a4 1.8t thanks... and already problem,,lol lucky me right

 

Not necessarily lucky you, B5's are pretty notorious for lots of small problems, but so very worth it

Things to check in this case: Make sure the secondary air pump is in fact functioning. It's located directly below the air box. Relatively easy access from underneath, or awesome access with a bumper removal. If it's functioning, check the relay; it has a tendency to stick. Its located in the ECU housing which is pretty much right in front of the steering wheel on the engine side of the second firewall. Pull the relay out, give it a shake, plug it back in. Worst case scenario, buy a new one, its only about 35 bucks depending on where you get it. After that, check all the connections of the system. Make sure there are no cracks in any of the hoses going to or from the pump, and make sure they're connected tightly to the combi valves they feed. If the pump's not functioning, start looking for a new one. Try junk yards, pick n pull's etc first, a brand new one will be about 350 bucks, a reman not too much cheaper.

Best of luck to you

 

ok thanks for imput do that 2day does the pump vibrate or anything so you know its running or what should i look for wih it

 

16795/P0411/001041 - Secondary Air Injection System: Incorrect Flow Detected
Possible Symptoms
Malfunction Indicator Light (MIL) ON
Possible Causes
Fuel Pump Relay (J17) faulty
Hoses/Pipes to/between Components faulty/clogged
Secondary Air Injection Pump (V101) faulty
Secondary Air Injection Pump Relay (J299) faulty
Secondary Air Injection Solenoid Valve (N112) faulty
Possible Solutions
Check Fuel Pump Relay (J17)
Check Hoses/Pipes to/between Components
Check Secondary Air Injection Hoses/Pipes for Carbonization
Check Secondary Air Injection Pump (V101)
Check Secondary Air Injection Pump Relay (J299)
Check Secondary Air Injection Solenoid Valve (N112)

 

thanks im trying to figure out there is a hose hanging by my passenger headlight i beleive goes to the s.ap but its open if that would be the problem i have the aftermarket carbio intake that was on the car and the kit says eliminate the sap from the factory intake but i dont know what to do if it comes off from underneith the car or plug it thanks.. anyone...

 

See my reply to one of your other 14 posts on the subject. And the guys above are exactly right in what they're saying.

 

what 14 posts i will check thanks