I have a 2004 Audi A6 with ~74500, had it almost a year, bought at ~68000. About 3 months ago I was getting the oil pressure warning light (it would come on and chime several times then in a few minutes turn off). Had it checked out, it was the sensor and I replaced it and the oil (~72000).
In the past week I've seen a few issues:
1. Oil pressure light turns on, chimes once, turns off
2. The ESP turns off randomly.
I took it to the dealer and they went over everything and said they had no faults aside from "... fuel too lean" and said that caused the ESP to turn off and I should replace the MAF. As of this writing I followed these steps: http://hubpages.com/hub/clean-replace-vw-audi-maf-diy
and now the ESP light is off and the car seems to run smoother.
Audi said they checked the pressure but could find nothing out of the ordinary also said I should use an Audi oil filter. I have a Mobil 1 filter and I use Mobil 1 synthetic 10W-40 High Mileage. One thing I did notice is that the dipstick is cracked which I'm looking to replace, but I'm guessing doesn't really mean anything.
Since cleaning the MAF oil pressure light came on again a few times, chimed 3 times, and turned off. I'm concerned that there is something else going on, but if the dealer says nothing is wrong, I feel I'm at a loss.
Has anyone seen or had this issue? Anything that you did? Could this be an oil or oil filter issue?
I did find the following posts, could it be sludge or just cleaning the pan/screens? Is anyone else using Mobil 1 10w-40 HM with/without issue, is that wrong (I live in CT).
Thank you in advance,