429
questions

Fault code P0420 is common in Audi's. And it refers to an inefficient catalytic converter. However, I have found that the fix for this fault code is seldom the catalyst itself but rather replacing the oxygen sensor.
I was hoping that someone could expand a bit on what they have read or seen in their experiences with Audi's? Thank you all and have a great day.

Back up. And now if my heat is on and I get hot so I'll turn it off and if turn on again won't come back in right away

my car went into the emergency gearbox.
the interesting and the computerized diagnosis not detected the fault.
the pilot sometimes stops flashing.
made the revision on the Dealers AUDI, the change of oils and all in August, I am now with 93333km.

last two months came up this problem worse and submetir the diagnosis in 2 different workshops.

how they can help and understand how to solve this problem

I just bought this audi and the battery light flickers on the dash and the air bag light is on it drives fine and I noticed the oil gauge on the dash doesn't move much

I got the car from auction. It did not indicate these issues. Odometer and speedometer does not work. Break lights are on after i got the rotar changed. ABS and Engine lights are all on? Other than all this the car runs fine

Please help

my audi doesnt have spark plug wires. my engine is described as coil on plug ( COP) ignition do not used ignition spark plug wires and i already replace the ignition coils and spark plugs and still have the same issues like it describes Symptoms of Wear or Failure

**The engine may be hard to start or not start at all
**Engine may run roughly
**Lack of power on acceleration
**Check Engine Light illuminate and/or flash.

so what should i do to fix my audi??

Also it is a Manuel transmission and a S line. Car runs well otherwise and I'd like to keep it as long as possible but not if its a huge waste of money. Thanks

My ac wouldn't work at first at all then we got it to cut on none of the bottom as will work it won't cut off an all it blows out is hot air!

I'm having trouble locating the vehicle speed sensor on the 04 audi a4 automatic, help!

Leak when it was parked then later that evening I checked leak stopped
What caused it

Car ran hot once and I had it towed to shop I was informed it was a coolant outlet flange busted. But they could not tell me if engine is blown until this piece is repaired 1st.

a mechanic said we could have problems with the transmission and the water pump it seems some of gears are not working correctly and advise us not to drive the car but when we pick up the car from him it seems ok so we are confused can you advise us what to do and if those are the problems how much could cost. thank you .Sonia

When I start my car (doesn't happen all the time) my check engine light and epc light pop on with car struggling to idle. If I hit the gas slightly they go off and everything is fine. I have taken it to dealership, my husband has hooked it up to code reader and it throws no codes! Not sure what it is or how to fix it, obviously it's not right. Any advise?

Wheels vibrate when driving at a high rate of speed. But the steering wheel doesn't vibrate.

Turbo? How do I know.

replaced coolant flange, could it be a possible smog pump that is leaking? found coolant inside air filter box. filter was soaked. what is the best way to go about finding the problem?

replaced coolant flange, could it be a possible smog pump that is leaking? found coolant inside air filter box. filter was soaked. what is the best way to go about finding the problem?

The mechanic says the valve cover is causing the leak, NOT the valve cover gasket. The cost will be $800, and I think this includes both the valve cover and the valve cover gasket. Does this seem right? Diagnosis says: "Valve cover is leaking oil. Breather system needs replacing with the updated valve cover, vent valve, hose, gaskets, and clips. $800." How urgent would this repair be?