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Hemal Mistry
Hemal Mistry, ASE Certified Technician
Category: Audi
Satisfied Customers: 104
Experience:  Expert
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I have an audi that has recently broken down and wont turn

Customer Question

JA: Hi. How can I help?
Customer: I have an audi that has recently broken down and wont turn over . the RAC has said that the oil level is too high as a result of the car “dumping diesel” into the oil as part of a safety feature to protect the engine. is this correct
JA: When was your last oil change?
Customer: tbh i am not sure
JA: What is the model/year of your Audi?
Customer: it is 2011 audi A3 sportback
JA: Are you fixing your A3 yourself? What have you tried so far?
Customer: so far nothing i am trying to get the steps to resolve and then figure out how to complete them. i am not great with cars the RAC man said this was an issue with the DPF as a result of failed regeneration
JA: Is there anything else the Mechanic should know before I connect you? Rest assured that they'll be able to help you.
Customer: nothing at the moment
Submitted: 9 days ago.
Category: Audi
Expert:  Hemal Mistry replied 9 days ago.
Good morning dear customer.I hope you are doing well.?Welcome to just answer.!
You may get a automated phone call request.
This is optional and it’s up to you weather you accept or not.Who do I have the pleasure of speaking with today.?My name is***** and I am a vehicle expert here on JustAnswer.My goal on here is to provide you with the best possible advise/outcome I can.Just so I fully understand on what’s been going on your vehicle won’t turn over now.
Oil level is too high.?Is this correct.?Kind regards. Hemal
Customer: replied 9 days ago.
i guess the issue is the car cut out and wont turn over.the RAC looked at it and noticed the oil level was too high and said this was because of the DPFi am wondering what the steps to resolve this would be
Customer: replied 9 days ago.
sorry i am Chris
Expert:  Hemal Mistry replied 9 days ago.

Hi there Chris.

I hope your well.

When was the last oil change done.?

Also have you topped up the engine oil in the meantime.?

Many thanks

Customer: replied 9 days ago.
tbh i am not sure
Customer: replied 9 days ago.
not recently
Expert:  Hemal Mistry replied 9 days ago.

Hi there.

could you please tell me the make and model of your vehicle.

Also the engine size.?

Many thanks.

Customer: replied 9 days ago.
2.0lt TDI audi a3 sportback 103k miles
Customer: replied 9 days ago.
the codes in the RAC fault report from his EPCSystem Type: ENGINE SYSTEM TEST/VALUES
DTC: P305400,Starter; blocked or electrical fault
DTC: P012100,Throttle potentiometer; signal not feasible
Customer: replied 9 days ago.
car over revved and cut out on busy A14, scanned and fault codes listed, suspect DPF fault and has dumped it into the oil as oil level overfull, control module not allowing starter motor to operate, garage attention required.
patrol towed to customers home address, advised won't be able to get another tow into garage.
Expert:  Hemal Mistry replied 9 days ago.

Hi there.

It may seem that you have a issue with 1 of the fuel injectors.

If there seals or injector itself is faulty what happens is that the diesel from there goes into the engine.

This means that it mixes with the engine oil itself letting the level of oil go high.

You can see this by taking the dipstick out and checking the oil with your fingers to see if it seems thin.

Diesel in the oil makes it go thin.


Customer: replied 9 days ago.
the oil level is high
Customer: replied 9 days ago.
how would this be resolved and how much would it cost
Customer: replied 9 days ago.
what leads you to think it is the injector?
Expert:  Hemal Mistry replied 9 days ago.
Hi there.This is a common issue.
I have a vw golf in the workshop right with the exact same problem.
Oil level was to high and mixing diesel.However without a proper diagnostics by a garage it maybe the injector as well as another issue alongside it.If there was a fault code for the DPF too this will cause a issue for that is it’s blocked.Thanks
Customer: replied 9 days ago.
any idea how much this would be to resolve
Expert:  Hemal Mistry replied 9 days ago.
Hi there,

If its just the injectors at fault to remove and test them as well as changing the seals can be around £300-£350 depending on the garages labour hourly rate,.

but a full diagnostics of the vehicle will indicate the exact issue.


Expert:  Hemal Mistry replied 8 days ago.

Hi there.

Is there anything else I can help you with today.?

Many thanks

Customer: replied 8 days ago.
no thanks
Expert:  Hemal Mistry replied 8 days ago.
Hi there.
Thank you for using JustAnswer.!
I wish you all the best.Have a lovely day.
Take care.
Kind regards. Hemal
Expert:  Hemal Mistry replied 8 days ago.