58
questions

It is a simpler question. How many cats are there on the 2002 Audi A6, 3L

I have a 2002 quattro 3.0 and I have been trying to track down the source of my reoccurring P0300,301,302,303 misfires... I have tried all the usual suspects... Replaced plugs and coil packs, O2 sensor (even though there was no o2 fault code and now there IS P0140), patched an exhaust leak, replaced breather hoses (found them cracked and broken when I did the o2 sensor), found that the vacuum line was not connected to the fuel pressure regulator so I reconnected it (NO change) I can't pass emissions with my check engine light coming on every time the car warms up (the only reason it goes off is because I clear the code)... Where should I go from here? (with very limited resources)

Runs great except when idling it cuts out and shakes. Any ideas? Also have headlight issue. Headlights will not go down to low beams and high beams work good. Checked several things. Changed out headlights from used car and not sure if that's the reason or if need to try something else or any ideas what to check?

costing/light braking to a stop and the anti-lock brake fires several times. then all is well. this happens in the summer. how can i fix the issue. The ESP light comes on and dealer will not invest the time to find the issue, just sell a new car

if i try to idle at 1000 rpm it surges from 2000 to 500 rpm it has emission codes would exhaust leak or emission sensors cause this ?

What could it means no oil is leaking

Does it sound like I need new transmission r just add fluids and change any broken seals??

the esp system doesn't work without the fuse andthe idle drops to low without that fuse, sometimes it stalls out when comming to a stop,does anybody know whats happening,please help audi dave

when turning volume up it may go up or down.