A4 (B6 Platform) Discussion Discussion forum for the B6 Audi A4 produced from 2002-2005

HELP!

Thread Tools
 
Search this Thread
 
Old Dec 2, 2014 | 05:09 PM
  #1  
pinstrip89's Avatar
Thread Starter
AudiWorld Newcomer
 
Joined: Jan 2014
Posts: 7
Likes: 0
Default HELP!

I have a 2005 Audi A4 1.8T all stock, no aftermarket parts. The low oil pressure warning light keeps showing up on my display while driving, it usually takes about 10-15 minutes for it to come on. I literally just changed my oil today, as well as the oil filter, and the spark plugs. This has happened before, but last time I just had an oil change done to it and it stopped on its own. I assumed this would be the case again, but it is not. I have read a lot of threads and forums in regards to it possibly being the oil pick-up tube, which I am not discrediting, but could it quite honestly just be the oil pressure switch that needs to be replaced or something smaller like that. Im not trying to go broke from bringing it to a dealer for them to tell me I have unicorns and **** jumping around in my engine poking holes and losing oil pressure. Any advice would be greatly appreciated.
Reply
Old Dec 3, 2014 | 04:28 AM
  #2  
lyleswk's Avatar
AudiWorld Super User
15 Year Member
 
Joined: Feb 2010
Posts: 3,066
Likes: 37
From: Fort Worth, Tx
Default

Usually indicative of sludge. Do you know the history of the car meaning maintenance routine? Was synthetic used on it?
Reply
Old Dec 3, 2014 | 05:19 PM
  #3  
pinstrip89's Avatar
Thread Starter
AudiWorld Newcomer
 
Joined: Jan 2014
Posts: 7
Likes: 0
Default

Honestly I'm not too sure. It has had three owners, me being the third. I know the second owner from whom I bought it from took care of it, not sure if they used full syn however. I have been using full syn for the past year and a half that I have had it. I replaced the oil pressure switch today, and drove it for about 30 miles with no oil pressure light. Tomorrow will be the defining factor as to wether or not that was the problem seeings how I have a 40 mile drive to work all highway. hopefully it works, I will keep you and the thread posted. Thank you for responding by the way.
Reply
Old Dec 4, 2014 | 04:57 AM
  #4  
pinstrip89's Avatar
Thread Starter
AudiWorld Newcomer
 
Joined: Jan 2014
Posts: 7
Likes: 0
Default

Well oil pressure switch did not work. Backs up against a wall now. I was reading however that someone had ran diesel fuel through his oil pan/ lines at idle rpm for two hours and then put new oil and a new filter back on and he says that resolved the issue of all the built up gunk. Do you think this is safe for the car or even work?
Reply
Old Dec 4, 2014 | 05:11 AM
  #5  
lyleswk's Avatar
AudiWorld Super User
15 Year Member
 
Joined: Feb 2010
Posts: 3,066
Likes: 37
From: Fort Worth, Tx
Default

I have read lots of solutions to sludge, but no experience with it. I would check with a dealer and see what they do to solve this issue and see if you can mimic that. Or, maybe some others have a solution.
Reply
Old Dec 4, 2014 | 04:01 PM
  #6  
pinstrip89's Avatar
Thread Starter
AudiWorld Newcomer
 
Joined: Jan 2014
Posts: 7
Likes: 0
Default

I put 1 quart of mystery oil into the system today, well see if that works, so far no joy, but I am going to give it a few days to work. If this doesn't work then I will most likely be pulling the oil pan and cleaning the oil pick up tube.
Reply
Old Dec 9, 2014 | 05:41 PM
  #7  
John535is's Avatar
AudiWorld Member
10 Year Member
 
Joined: Apr 2013
Posts: 461
Likes: 5
Default

I would not be doing the diesel 'trick' on a modern engine. Basically they are just washing the inside of the engine with the thinnest possible liquid that would still technically be considered 'oil'.

Let us know if the Mystery oil additive does anything? Because you just changed your oil recently, it would be interesting to know if this stuff really removes any additional sludge.

The fact you just did an oil & filter change my gut feel is I would be dropping the sump.

You will need a day and the following parts (check the correct part numbers for your engine)
2 Sub-Frame Bolts M12x1.5x110 N90823501 (These are stretch bolts and must be replaced)
4 Sub-Frame Bolts M10x70 N90663002 (These are stretch bolts and must be replaced)
1 Turbo Oil Return Line Gasket 058145757A
The OEM sealant that the dealer uses is white VAG P/N: D176404A2
or ECS Sells elring Dirko P/N: UN1253000 or equivalent.
Pickup Tube O-Ring 20x3.15 N0282222

Lots of rags and cleaner
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Ftrosky@verizon.net
Q7 MK 1 Discussion
9
Jan 4, 2025 06:51 AM
Tre Fiffty
Audi A5 / S5 / RS5 Coupe & Cabrio (B8)
6
Jul 3, 2020 07:14 AM
MajikTim
Audi A3 / S3 / RS 3
1
Mar 2, 2019 05:16 PM
Iesha Brown
A4 (B6 Platform) Discussion
12
Apr 17, 2014 07:38 AM
darkneve
A4 (B5 Platform) Discussion
9
Feb 10, 2007 07:48 PM




All times are GMT -8. The time now is 02:11 PM.

story-0
10 Strangest Audi Designs That Actually Made Production

Slideshow: 10 strangest Audi designs that actually made production

By Joe Kucinski | 2026-06-10 16:32:29


VIEW MORE
story-1
2027 Audi Q7 and SQ7: Audi Upgraded EVERYTHING!

Slideshow: Everything you need to know about the 2027 Audi Q7 and SQ7

By Michael S. Palmer | 2026-06-09 06:02:56


VIEW MORE
story-2
Audi Unveils Absurdly Cool New Supercar: 10 Things You Need to Know!

Slideshow: Limited to just 499 units, the 987-horsepower halo car signals a new chapter for Audi performance.

By Verdad Gallardo | 2026-06-04 17:37:15


VIEW MORE
story-3
The Highs & Lows of Every Audi C-Class Generation

Slideshow: The highs and lows of every Audi C-Class generation.

By Joe Kucinski | 2026-05-27 16:05:50


VIEW MORE
story-4
Top 10 Most Expensive Audis Ever Sold on Bring-A-Trailer

People were more than happy to shell out big bucks for these cars.

By Brett Foote | 2026-05-27 15:32:23


VIEW MORE
story-5
10 Audi Features & Options We Miss the Most!

Slideshow: 10 Audi features and options we miss the most.

By Joe Kucinski | 2026-05-12 19:33:47


VIEW MORE
story-6
Audi Recreates Crazy-Looking Speed Record Breaker From 1935

Slideshow: Audi has recreated one of the wildest machines of the pre-war speed-record era, reviving a streamlined V16 racer that originally exceeded 200 mph in 1935.

By Verdad Gallardo | 2026-05-11 09:49:34


VIEW MORE
story-7
Coachbuilder Recreates the 1995 Audi TTS Concept

Slideshow: A Dutch coachbuilder has reimagined the original Audi TT by finishing what the 1995 concept only hinted at.

By Verdad Gallardo | 2026-05-05 15:17:58


VIEW MORE
story-8
Every Audi V10 Car Ranked!

Slideshow: Ranking every Audi V10 road car

By Joe Kucinski | 2026-04-29 16:11:56


VIEW MORE
story-9
9 Audi Designs That Aged Like Fine Wine

Slideshow: A look back at the Audis that didn't just survive changing tastes, they quietly outgrew them.

By Verdad Gallardo | 2026-04-28 19:38:27


VIEW MORE