Red oil pressure warning came on

20

Asked by Dec 01, 2015 at 12:02 AM about the 2005 Audi S4 quattro Sedan AWD

Question type: Maintenance & Repair

Red oil pressure warning came on. The status of how it is driving has not
changed. There is no knocking or pinging. I checked the oil, it was a little low
so i put a quart of full synthetic premium oil in. Problem still persists.

6 Answers

That light is on for a serious reason. Full quantity does not mean full oil pressure. For the sake of a $3,000 engine, have it towed to a shop or dealer. The sending unit may be faulty, giving a false low read. (Hopefully that's all) But that is a $10 part and the engine needs to be checked with a diagnostic computer, and I don't mean OBDII. But also, you say "a little low" and you added a full quart? Overfilling is just as bad as low, the crankshaft can dip in to the oil in the pan and whip it in to a foam...like a blender, causing no oil pressure

3 of 3 people found this helpful.
Best Answer Mark helpful
20

The oil is exactly the amount it should be after that quart. And i am aware that putting too much oil in can be harmful. I am a mechanic, i worked at Nissan for 3 years, but this is my first Audi, and in my opinion i dont know that much about it yet. Im letting her rest for the night. Although, If there were no oil pressure im sure i would know the difference in how she drives. Wouldnt u think?

1 of 1 people found this helpful.

With no tapping/knocking sound I do not think it would effect performance. But an Audi is not so exotic to be different than any car as far as that's concerned. I still lean to faulty sender. I did not mean to insult you as if you know nothing about this stuff... I have a bad habit of doing that.... going under the assumption that a question is from somebody that knows jack.

2 of 2 people found this helpful.
20

Im confused, r u calling me the sender, because i asked the question? I know plenty about cars, especially Nissans cuz i used to get paid o work on them. But like i said this is my first Audi. And really what im trying to ask is if this issue is something i can fix myself through trouble shooting a few things or should i immediately take it to my Audi guy?

1 of 1 people found this helpful.

No, no, I mean oil pressure sending unit. No way would I call you a faulty sender.. as a person. In the early 90's I had a Quattro that one day my (then) 6 year year old decided to fill her up... with the garden hose. The the wife pulled the hose out and proceeded to drive away. She got about one block and called me, bitching about 'her' car died. I don't know about the Audi's these days, but this was a 2.5L 5 cylinder that had a 'fuel distributor' that ran off camshaft, and produced something like 2500 psi (no typo, 2500) fuel pressure, it was set up to inject a such a moment to overcome compression and that little 5-banger would scoot. I think it was about 250 HP. Anyway, the car, after $1500 work, was never the same. Since you asked, my opinion is take it you your Audi guy. When I said they are not exotic... well maybe I jumped the gun. Audi's are fairly exotic and what you spend may well save you a lot more in the end game.

2 of 2 people found this helpful.

I went back and looked it up and it was a 2.2 with 210HP. Still pretty decent

2 of 2 people found this helpful.

Your Answer

S4

Looking for a Used S4 in your area?

CarGurus has 1,566 nationwide S4 listings starting at $3,850.

ZIP:

Audi S4 Experts

  • #1
    Cynergyzed
    Reputation
    170
  • #1
    richm58
    Reputation
    170
  • #3
    Ryan Conde
    Reputation
    150
View All

Related Models For Sale

Used Audi A4
245 Great Deals out of 12,122 listings starting at $1,450
Used BMW 3 Series
1,117 Great Deals out of 34,037 listings starting at $1,209
Used BMW M3
30 Great Deals out of 1,860 listings starting at $5,495
Used Audi S3
8 Great Deals out of 788 listings starting at $18,995
Used Audi A6
144 Great Deals out of 7,665 listings starting at $900
Used Mercedes-Benz C-Class
730 Great Deals out of 26,005 listings starting at $1,995
Used BMW 5 Series
479 Great Deals out of 16,444 listings starting at $995
Used Ford Mustang
341 Great Deals out of 42,379 listings starting at $1,488
Used Mercedes-Benz E-Class
532 Great Deals out of 21,623 listings starting at $1,999

Used Cars For Sale

2018 Audi S4 For Sale
669 listings starting at $47,524
2016 Audi S4 For Sale
43 listings starting at $29,999
2015 Audi S4 For Sale
7 Great Deals out of 162 listings starting at $23,995
2014 Audi S4 For Sale
121 listings starting at $19,995
2013 Audi S4 For Sale
94 listings starting at $17,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.