oil pressure too low/epc light

Asked by Apr 10, 2018 at 06:09 AM about the 2010 Audi A5

Question type: Maintenance & Repair

Hello , please help me! I have an Audi A5 1.8 tfsi and I got a light on
dashboard when i start the engine, saying "switch off engine oil pressure too
low". It came on and beeped light for 3 times then stopped. There is another
error that appears when i accelerate the car over 4.000 rpm, the EPC light
comes on with the message "Do not exceed 4000 rpm". I changed both
sensors (blue&brown) 2 times, but no result ! What should i do ? Sorry for
my english mistakes btw.

10 Answers


The EPC light comes on because there is one of the following problems: - Fuel pressure sensor harness is open or shorted - Fuel pressure sensor electrical circuit poor connection - Faulty fuel pump - Blocked fuel filter - Fuel line restricted - Faulty fuel pressure regulator - Faulty fuel pressure sensor The computer has detected something that can damaged the engine and has put it into safe mode. I think that you should take the car to the Audi dealer or a reputable mechanic, to have it checked and the problem corrected. Oh, and I did not have any problems reading your post.

I read many forums before and everyone says that EPC LIGHT comes on when there is insufficient oil pressure at high rpm...


Yes, correct, I only sited to you a few of the reasons for the light to come on. The EPC detects numerous functions of the engine and, as in your case, oil pressure is low. Your car has an auxiliary light that indicates the exact problem, while in others, the codes must be run to find the cause. Again, take the car to have it checked to avoid yourself possible big problems.

1 people found this helpful.

I checked it, the oil pump is ok, the brown pressure switch is OEM, the blue one is HELLA . what should i do further ?


Alex, how do you know that the oil pump is ok? Did you perform an oil pressure check with a mechanical gauge. OEM means Original Equipment Manufacturer, a company that produces parts for other manufacturers. HELLA is a Geman manufacturer of automobile parts. If the warning lights are still on, what you need to do is have the car inspected by a mechanic. Obviously, you cannot ascertain what the actual problem is, neither can I from a distance. But we know that it is related to the oil because of the "oil pressure too low" and "do not exceed 4,000 RPM.

The oil pressure is 1 bar, the mechanic told me that it's a good value. He also told me the pump is almost new. The error on VCDS was at the brown switch. Maybe it's a wire problem


Well, if you had the car checked by a mechanic and he feels that one bar of oil pressure in the gauge is good; and that the pump is almost new, then you should not have to worry about any problems. If the codes are gone after you replaced the brown switch, so much the better. Just keep an eye on the instruments (gauges) for a few days. Good luck!

I am having the same problem with my 2011 Q5 (3.2). With regards to the “oil pressure too low” I have to get an oil pump. The dealer quoted me a cost of $1,500.00

The mechanic told me that the oil pump is almost new.

Low oil pressure with an almost new pump? Wow I also had to replace the tensioner’s, and the sensor as a precaution.

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