You need a VCDS scan too see what the MAF is saying and also O2 sensors and what cylinder the misfires are coming from.
Try unplugging your MAF sensor first it could be sending dodgy info to ECU. If no change then do the thing below.
stand at the back of the car when starting it and see wait...
Does VCDS say anything as I dont think mine did as it thought it was genuinely short of oil
Worth a punt on another cheap sensor, mine has been ok for 2 1/2 years now
I also have ASN and previously had random oil low message on DIS, I also changed the sensor (£5 china job) fixed the fault. Usually came on after about 30 miles open bonnet close bonnet and would go away and then randomly come back on.
when I had a sensor fault it didnt come up on the DIS...
My ASN has been having this for 4 years and hasnt missed a heartbeat, change every 6000 miles currently £35 for 20L Says longlife but is 502 and 505 compatiable which is normal servicing
20L Mannol Premium 5w30 Fully Synthetic Long Life Engine Oil Low Saps C3 SN/CF...
My initial thoughts last Month when it first started was the B1 pre cat sensor but because it is acting the same as the B2 pre cat sensor (where there isn't a problem) I dismissed it.
I have managed to buy a new bosch pre cat sensor and the other option after reading up is to check the exit of...
That is exactly what i have done, although my results in regards to emissions are sligtly lower in 60’s instead of 90’s.
I got cat 1 not ok also, then MOT passes with <.30% = 0.01 emissions. Only thing I can think of is that he measured it against a very high threshold limit.
Thanks Callum, the fuel trim on both banks is between -1 and -2 which in my mind says there isnt any extra air getting in (manifold or otherwise) even if there was the cat should still deal with it.
Audi Cab 3.0 V6
Engine light coming on caused by:
16805 - Warm Up Catalyst; Bank 1
P0421 - 001 - Efficiency Below Threshold - MIL ON
My VCDS states:
B1S1 is fine pre-cat sensor jumping between 0.1v-0.9v (lean to rich) as it should.
B1S2 is also jumping around but it...
I also have 3.0 V6 and had YELLOW oil level fault, RED is the more serious oil pressure.
Mine usually came up after 50 miles, if you know your oil is fine open the bonnet and close it and it goes away as it assumes you have put more oil in. Mine was at 80k when it became dodgy I replaced it and...
There are many generic considerations and some specific to S4, some off the top of my head
Deffo check all wheel arches as they are a weak point in regards to rust
when was the timing chain (tensioners) last looked at
How much does the engine rattle when started from cold
(If cab) check radio...
Probably not best practice to be looking down that low whilst driving.
Cheapest option would be to use your phone if you are wanting audio guidance seeing as its already kicking out sound through bluetooth.
In the B6 cabriolet its behind the left panel in the boot, slots into a cage.
Below is your car, no25
https://www.realoem.me/Audi/RDW/A4/2002/249/R/0/035/35000
You need to stick it on vcds and have a look on steering module it will tell the angle what it thinks the steering wheel is, make sure its straight. Depending on what it thinks the angle is a slight turn of the wheel will make it think you are throwing it around corners and activate ESP...
This is where it starts to get messy in my head, when you say you have the 8E0953549N steering module that is for cruise and old skool multifunction (b6) check link below.
The functions on your new wheel I would of thought would require 8E0953549Q or R (B7).
If you do need that module you...
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