MH-8

Hi,

Audi A8 D2 3.7 V8 Q, 2000.

I replaced a broken SAI (secondary air injection) pump to new one (new pump works, tested), but the pump does not start to operate when the engine is cold. I tested with VAG-COM also and tried to start the pump manually, but relay is just ticking. I have read the Audi forums, but I have not received clear that whether there is only a 40A relay for pump or is there also a fuse somewhere?

Martin

silverd2

In U.S. models (LHD), the relay is in the electronics box (ECM, TCM, etc) under the hood...and there is a 50amp fuse in the main fuse panel next to the passenger's right foot >>>

MH-8

Thank you very much! I checked under the hood (passanger side) and is it correct that the grey one "214" is relay? (it is 40A)

MH-8

Checked the situation, the 50A fuse was burned. I replaced it and now the secondary air injection pump works!

Many, many thanks!!!

MH-8

Checked the situation, the 50A fuse (passenger side) was burned.





I replaced it and now the secondary air injection pump works!

Added also a photo here, if there is someone who has the same problem and looking for a possible solution.


Many, many thanks!!!

D3Lowered

I am having the same issue as you and am looking for that fuse box and can not find it anywhere. I have a 2006 a8l 4.2 engine. Can you please tell me where those fuse boxes are located?

A8l

jfrahm

Check the D3 forum for D3 info.

Oxnardo Ring

Damn, Sam, I never realized that was a 50A circuit. I guess that explains the volume on the grinding noise during warm-up on my son's 2001.
Thatsa a lotta Watts.