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 1,623 nationwide S4 listings starting at $2,995.

ZIP:

Audi S4 Experts

  • #1
    Cynergyzed
    Reputation
    170
  • #2
    Ryan Conde
    Reputation
    150
  • #3
    Peter Tablan
    Reputation
    130
View All

Related Models For Sale

Used Audi A4
309 Great Deals out of 12,414 listings starting at $1,899
Used BMW 3 Series
1,038 Great Deals out of 32,538 listings starting at $1,200
Used BMW M3
39 Great Deals out of 2,079 listings starting at $5,495
Used Audi A6
174 Great Deals out of 7,550 listings starting at $1,200
Used Audi S3
7 Great Deals out of 739 listings starting at $21,995
Used Mercedes-Benz C-Class
862 Great Deals out of 28,373 listings starting at $2,001
Used BMW 5 Series
503 Great Deals out of 15,425 listings starting at $1,650
Used Ford Mustang
600 Great Deals out of 38,611 listings starting at $1,895
Used Mercedes-Benz E-Class
677 Great Deals out of 22,622 listings starting at $1,197

Used Cars For Sale

2018 Audi S4 For Sale
651 listings starting at $49,873
2016 Audi S4 For Sale
5 Great Deals out of 58 listings starting at $35,999
2015 Audi S4 For Sale
3 Great Deals out of 158 listings starting at $26,995
2014 Audi S4 For Sale
6 Great Deals out of 165 listings starting at $21,995
2013 Audi S4 For Sale
4 Great Deals out of 111 listings starting at $18,995

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.