No oil lamp with ignition on (engine off)

[Red Robbo]

After 4 years ownership, i only noticed recently that with ignition on, but engine off/never started, i don't get the red oil can warning (low pressure) light. All the other usual suspects illuminate as they should (engine management light, handbrake, abs, airbag, steering, brake fluid, glow plug and red triangle with exclamation ❗ mark), but no oil can symbol illuminates.

Is this a quirk of the A4 B9 2.0 TDI (2017), or have i a ropey wire off the oil pressure sensor?

There are no warning lamps illuminated after the car has done it's own diagnostic check, and the engine is started, they all extinguish as they should, plus OBDeleven shows no fault codes (apart from a problem with the heated and cooled cup holder - i don't have this, and i didn't know it was a thing anyway! But the code always crops up!).

So, is it correct (no oil can warning light with just ignition on)?

Or is something amiss, even though no faults show?

I've never had a car that doesn't illuminate the low oil pressure oil can lamp with ignition on.

Oil check via the mmi service check is spot on too.

Maybe i'm about to answer my own question here, but could it be something to do with the oil level sensor playing a part in it(?)

Cheers

[Steve Q]

I think it's just a quirk of the car. If no fault codes, I wouldn't worry about it 

[Red Robbo]

Cheers Steve Q.

I asked our kid who drives a 2014 Audi A5, and he has no oil pressure warning lamp illuminate with ignition on either.

So it's a given, i think, that Audi decided in it's wisdom, not to show the warning light unless there was an issue with oil pressure.

I can live with this 😁

Cheers

[cliffcoggin]

I am not convinced. The purpose of illuminating every warning lamp initially is to test them and ensure they are working. (It is known in industry as a lamp test function.) If a genuine oil pressure was ever detected how would you know it if the lamp does not work?

[Red Robbo]

Agreed.

As i initially mentioned, i've never come across a vehicle that doesn't test the oil pressure lamp with ignition on, as it cycles through it's own diagnostic check.

But both our kids and my car don't show this particular lamp at all during self check.

There must be umpteen Audi A4 and A5, 2014 - 2017 cars (and their drivers) on this forum who maybe can check their dash, for this particular warning light.

I only mention the years as those are the model years of my car, and our kids

Cheers all