2012 A4 Need Help !!!

[Franny1978]

My wife’s friends kid wanted to do our snow tires I didn’t have time so said sure I find out he added oil to the car (oil sensor doesn’t work) and over filled it to the point I couldn’t even get it started he drained a bunch out I just drove it home and the Engine light is now staying on as well as the “EPC” light it drives like absolute garbage both lights were never on before

Any advise I am fuming mad right now

[Smac770]

You'd need to scan for codes and see what it's actually saying "on the inside". I don't know any automatic expected issues from overfilling with oil. If the oil level sensor doesn't work, you need to validate the current oil level with an appropriate dipstick or drain and refill with an exact amount to restore to a known correct situation. That the oil level sensor doesn't work is probably why the MIL and EPC are on.

[Franny1978]

The oil sensor hasn’t worked for a while I always check with a dip stick

The warning lights were never on before

[A4B8 2.0tfsi]

"My wife's friends kid" yeah right LMAO

Why would he fill oil when he changed tires, and why don't you have 30 minutes to change them yourself? Alot of questions and why are you upset?

[Franny1978]

Update my buddy came over we pulled the spark plugs and the one was totally messed up

We ended up replacing all the spark plugs and it’s firing normal again the engine light is still on does that need to be cleared or will it clear on its own

[Smac770]

You can either manually clear it (if you have a suitable scan tool) or it should self clear after sufficient drive cycles if the issue that set it is no longer testing positive.

[mrg_B8TFSi]

Yeah I’m confused as to the sequence of events here, snow tires to over filled motor with oil?? That’s not making any sense.. if your oil level sensor has been defective you would have been in EPC mode for awhile. I understand you are using a dipstick but the MMI doesn’t know that.. like smac said get it scanned with Ross Tech VCDS and not any other cheap toy like OBD11. Why don’t you put in a new sensor?


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[Franny1978]

Sequence of events he put on the snow tires took it for a spin noticed they

[Franny1978]

Took it for a spin after putting the snow tires on noticed the “add oil max 1L” error message and I always keep oil in the trunk decided to add a bunch of oil to clear the message over filled the car to the point it wouldn’t start

I constantly get the add oil message even when the oil level is correct I use a dipstick to check so I am assuming I have a bad oil sensor ?

[Smac770]

Possibly. I'd scan for DTCs and see if anything is there. Then check the oil level measuring values to see if they appear intelligible. Etc.