"oil" displayed on start up

I would agree sounds like a faulty switch, its a cheap part just change it. However why are you changing your oil every 40 day?? 10-12,000 miles is more than sufficient. Changing oil too often is actually bad for your engine!

Hello Kemi1017,

Scared is good (unless you are independently wealthy).

It would be wonderful if your OIL SENSOR (pressure switch)
were suddenly bad... but that is not the way to BET YOUR MONEY.

More likely it is a problem with the OIL PUMP itself or
worse general wear condition of the engine (can't
even properly speculate without the year, mileage and
an operating history of the vehicle...
HELP us to help you: INCLUDE INFORMATION...
AUDI A6 spans decades... Quite a wonderful vehicle
(highly technical, diagnostics that predate industry
on-board diagnostic standards...
(See FACTORY specifications at bottom).

For my MONEY... (FREE services available)
I would look to the MANUFACTURERS TECHNICAL SERVICE BULLETINS and WIRING DIAGRAMS available on BBB Industries website (see bottom, below)... REGISTRATION is required as these are REAL DOCUMENTS..

I would also attempt

Driving a vehicle without adequate oil pressure can
destroy the engine (easily).

If you are not into taking the ALARM seriously...
by all means keep shopping for an ALARM SWITCH
that will fail to tell you... "you are in serious trouble".

Hopefully the CLATTER of your engine will hold
your attention... until you properly address
your OIL PRESSURE PROBLEM.

TIMELY maintenance will hold down costs considerably.

Good luck.

2008 AUDI A6 3 2L V6 Oil Pressure Sender Switch RockAuto

http://www.rockauto.com/en/catalog/audi,2008,a6,3.2l+v6,1441568,engine,oil+level+sensor,5700

FREE TSBs
BBB Industries Premium Alternators Starters Power Steering Products

Sample FACTORY WORKSOP MANUAL
Audi 80 1987 Workshop Manual Page 25

Carnac the Magnificent

Sounds like you need to reset your Oil life/ maintenance reminder light. (also, double check your oil level)

To reset Oil life on a standard dash stlye:
1. pres and release the TRIP/RESET button until the message center displays SETUP MENU HOLD RESET
2. Press and hold the TRIP/RESET button for 2 seconds until the message center displays RESET FOR SYS CHECK
3. press and hold the TRIP/RESET button for 2 seconds until the message center displays OIL LIFE xx% RESET IF NEW
4. Press and release the TRIP/RESET button until the message center displays HOLD RESET IF NEW OIL
5. Press and hold TRIP/RESET button for 2 seconds and release to reset oil life to 100%
6. Message center will briefly display OIL CHANGE SET TO 100%


With a message center cluster the procedure is as follows:
1. press and release SETUP button until message center displays PRESS RESET TO BEGIN SYSTEM CHECK
2. Press and release RESET button until the message center displays HOLD RESET IF NEW OIL
3. Press and hold RESET button for 2 seconds and release to reset the oil life to 100%
4. The message center displays SETUP MENU HOLD RESET


Hope this is what you need/ are looking for. Goodluck & let me know how it goes, or if you have a different problem.

The oil pressure sender unit is located on the oil filter housing.These do tend to leak at times. The warning light for this switch is a red oil can and a buzzer. Replace the switch. If warning light still comes on, have the oil pressure checked. The oil level sender warning light is an orange oil can with oil level under it. This sender is fitted on the bottom of the oil sump and can leak past the seal. If warning light comes on, check oil level. If ok, check for damage to wiring under vehicle. Senders do some times become faulty.

this could be due to low oil. you need to check your oil level. if it is full i would do an oil change with a bmw filter. there is a difference in filters. the service engine soon light will have to be diagnosed. meaning pull codes to point you in the right direction. great car though. happy holidays

Ford Explorer, Mercury Mountaineer, 2002-06

To reset CHANGE OIL SOON/OIL CHANGE REQUIRED message on the Message Center, press the SET UP control to access the System Check mode. Press and release the RESET button to display “OIL LIFE % HOLD RESET NEW” is displayed. Press and hold the RESET button for 2 seconds until “IF NEW OIL HOLD RESET” is displayed. Press and hold RESET button until “OIL LIFE SET TO 100%” is displayed.

Ford Five Hundred, Freestyle, Mercury Montego 2005-06 Tap the ODO/TRIP button to toggle the display between the odometer and trip odometer. Tap on the ODOiTRIP button again to toggle the display between the trip odometer and OIL LIFE % display. Press and hold the ODO/IRIP button for 2 seconds or more to display OIL LIFE 100%. Your oil life in now reset.

Try this link for a free manual:-
http://rapidshare.com/files/36721081/Audi_A4_B5_97-2000.rar

Check the oil level is ok, change the oil if it hasn't been recently done.
Check operation of the oil press alarm sensor,
Check the oil pressure - using an independant oil pressure gauge if in doubt.

oil is low when first starting but as pressure builds up it goes off. check your oil before starting the car to see if it's low.

The oil filter is no longer a "spin-on" type filter. Toyota has changed to the "cartridge" type filters that are in a cylindrical housing on the engine. You need to remove the filter housing to access the cartridge. Make sure that you replace the o-rings that come out with the cartridge filter with the new ones supplied in the new filter box. To reset the light, follow these directions:

Turn the key ON, do not start the engine.

Look at the odometer, and verify that it displays "TRIP A". If it is on "ODO" or "Trip B", press the black stick next to the odometer to read "TRIP A".

Turn the key OFF.

Press in, and HOLD the black trip meter reset button, hold it IN.
DO not release it.

Turn the key ON, do not start the engine

Observe the Odometer display. You will see 5 dashes, then 4, then 3, then 2, then 1 dash, and finally, 5 zeros. Then, whatever number that was displayed on "TRIP A" will be re-displayed..

Now release the black trip meter reset stick.

This completes the reset procedure, and it will be back on in 5,000 miles, to remind you of you next oil change.