Hi All,

New to the forum but looking for some help.

I have an Audi A3 2006 S Line 2.0L TFSI when driving the car after 20 to 30 mins my oil pressure warning comes on then goes off for 3 to 5 mins then comes back every so often i get puffs of white smoke from exhaust but not all the time. Any ideas what this can be.

Oil levels are ok had oil and filter changed around 10 months ago.

Welcome Ed,

Great that you have checked the oil level, but we are talking oil pressure here, and not oil levels.

The fact that the pressure warning comes on when the oil is up to temperature is significant, and if you ignore this, you do so at your own peril.

What mileage have you done in the last 10 months (since oil and filter were changed)? How long have you owned it, and what has been the servicing regime during your ownership, and in previous ownership.

Issue could be as simple as a faulty oil pressure sensor, and as complex as a potential oil pressure pump/ worn crankshaft bearings.

If it were mine, I would be getting the actual running oil pressure measured as a first port of call. I would also be limiting its use until inspections have been carried out.

Regards,

Gareth.

Hi gareth

Only done around 2,000 miles in last 10 months as it was not being used for at least 6 months in that time.

I have had the car around 4 years and has passed mot etc every year with only having to replace halex on it. Just had my cluster re built.

Any idea where the locations of the sensors are as i can take a look myself

Have a look at LLL Parts website. There should be schematics on there. You are looking for an oil pressure sensor.

Thanks for your help i will take a look and see what i find

3 hours ago, edA306 said:

Thanks for your help i will take a look and see what i find

Hi its not a pressure sensor its the oil pump drive shaft rounding off through wear/age back then they all used the same pump and hexagonal drive shaft.

Steve.

Hi Steve,

You seem very sure lol and sounds expensive. Is it worth trying new sensors 1st.

Would there be other symptoms other than what i have noted that i should look out for.

23 hours ago, edA306 said:

Hi Steve,

You seem very sure lol and sounds expensive. Is it worth trying new sensors 1st.

Would there be other symptoms other than what i have noted that i should look out for.

Hi seen a fair amount of these with the same symptoms go through my local garage, asked them today and they said 06-09 the TFSI engines were notorious for this as the oil pump drive is taken from the balance shaft which lives a rather precarious life as its under constant vibration from the engine, this over time causes oil pump wear on the pumps drive shaft thus the intermittent pressure light, if it was the later engine the whole oil pressure system is controlled by two pressure regulator solenoids and two pressure sensors that send different signals as the pressure rises and falls over a drive cycle, yours is less complex as the pressure sensor is in the pump and not in the oil filter housing which is why for your yer they do a pump conversion, yes not cheap or a conversion to the earlier 1.8 oil filter housing which has the pressure sensor built in, don't take my word for it have a look on YouTube for the conversions, I sincerely hope it is just a pressure sensor.

Steve.

Hi steve,

Thanks for your knowledge very helpful.

Am i right in thinking mine should have 2 switches blue and brown and sensor near filter/sump

3 minutes ago, edA306 said:

Hi steve,

Thanks for your knowledge very helpful.

Am i right in thinking mine should have 2 switches blue and brown and sensor near filter/sump

Hi that sounds about right, hopefully its one of the three.

Steve.

Cheers see what i can do over the weekend 🤞

Hi Guys,

Any ideas on where i can find the oil switch sensors on this engine i must be going blind

Pic 2