The Warning Lights Audi and VW Drivers Should Never Ignore 

Some warning lights are serious, and in Audi and Volkswagen vehicles, ignoring them can lead to major repairs.

If you drive an Audi or Volkswagen, there are a few dashboard lights that should never be brushed off. At Northside Autohaus, we regularly see what happens when critical warnings go unchecked. The result is often a bigger, more expensive repair that could have been prevented with a proper check-up.

Here’s what each of these warning lights means, what usually causes them, and what to do if one lights up while you’re driving.

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5 Important Warning Lights to Watch for in Audi and VW Vehicles

1. Oil Pressure Warning

  • What it means:
The engine isn’t getting enough oil pressure. This can lead to catastrophic engine damage in seconds.
  • Common causes:
  • Low or old engine oil
  • Oil pump failure
  • Internal engine wear
  • Blocked oil pickup or sensor fault
  • What to do:
  • Stop the car immediately and turn off the engine
  • Do not restart it
  • Call for a tow as driving further could seize the engine
  • Real-world outcome:
We’ve seen multiple Audi engines written off because drivers kept going after the oil light came on. This is not a “top it up later” situation.

2. Coolant Temperature Warning

  • What it means:
The engine is overheating or the system has lost pressure.
  • Common causes:
  • Coolant leak
  • Failing water pump
  • Thermostat jammed shut
  • Cooling fan or sensor fault
  • What to do:
  • Pull over as soon as it's safe
  • Turn off the engine and let it cool
  • Don’t open the coolant reservoir while it’s hot
  • Arrange a check-up or tow if needed

Learn how we handle cooling faults and overheating during our Volkswagen servicing process.

3. Brake System Warning

  • What it means:
There may be a fault in the brake system, including low fluid, ABS failure or brake pad wear.
  • Common causes:
  • Worn brake pads
  • Brake fluid leak or low fluid
  • ABS control unit fault
  • Parking brake malfunction
  • What to do:
  • If the pedal feels soft or the car pulls when braking, stop driving immediately
  • If it drives normally, proceed slowly and book a check-up
  • Don’t delay — brake issues can escalate quickly
We’ve had clients come in with this warning light active for weeks. One had nearly worn through the disc rotor. Servicing brakes early always costs less than ignoring them.

4. EPC (Electronic Power Control)

  • What it means:
There’s an issue with engine management, throttle control, or electronic sensors.
  • Common causes:
  • Faulty accelerator pedal sensor
  • Throttle body problems
  • Boost pressure irregularities (common in turbocharged VW/Audi engines)
  • Wiring or ECU issues
  • What to do:
  • If the car enters limp mode or loses power, pull over
  • Turn the car off and restart to reset
  • Drive gently to a workshop if safe, or book a tow

Our European diagnostics tools allow us to pinpoint the exact EPC fault — no guesswork.

5. Check Engine Light (Optional Bonus)

  • What it means:
A fault has been logged in the engine or emissions system.
  • Common causes:
  • Oxygen sensor or MAF sensor fault
  • Misfire or spark plug issue
  • Fuel system irregularities
  • Carbon build-up or turbo inefficiency
  • What to do:
  • If the light is solid and the car drives normally, book diagnostics
  • If the light is flashing, stop immediately (could be a misfire or damage in progress)
The check engine light covers a wide range of issues. We’ve traced it to everything from minor vacuum leaks to pre-failure turbo warnings.
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Why Diagnostics Matter

Dashboard lights tell you something’s wrong. But they won’t tell you what or how serious it is.

At Northside Autohaus, we use manufacturer-approved tools like VCDS and ISTA to scan the exact fault codes, run system tests, and isolate the cause. Whether it’s a brake fault or an intermittent sensor, we can give you answers quickly — and quote only for what’s actually needed.

Book Diagnostics with Northside Autohaus

If a warning light just came on or your car feels off, don’t ignore it. Our specialists can identify the issue, explain your options, and prevent it from turning into a major repair. Book a diagnostics check with Northside Autohaus in Brookvale.

What our customers say about us

Northside Auto Haus | The Warning Lights Audi and VW Drivers Should Never Ignore Noemi Bull
03:52 25 Mar 24
Great service
Northside Auto Haus | The Warning Lights Audi and VW Drivers Should Never Ignore Joel Phillips
07:10 03 Jan 24
Jeff was incredible to deal with. Gave us a loan car at a time I was in desperate need. Extremely good service.
Northside Auto Haus | The Warning Lights Audi and VW Drivers Should Never Ignore Paula Brennan
01:42 24 Jul 23
Amazing team! Great mechanics and honest with pricing and outcomes! So good
Northside Auto Haus | The Warning Lights Audi and VW Drivers Should Never Ignore Yolanda Bensdorp
22:20 26 Jun 23
Romeo and his team was very professional and helpful and did a great job on my car
Northside Auto Haus | The Warning Lights Audi and VW Drivers Should Never Ignore Michael Christie
23:43 22 Jun 23
Friendly and thorough.
Northside Auto Haus | The Warning Lights Audi and VW Drivers Should Never Ignore Nicola Baker
23:17 15 Nov 22
Could not be happier with Northside Autohaus. From my fist point of call speaking with Romeo, he was quick to fit me in as my Audi Q5 was leaking adblue liquid and needed urgent attention. When arriving at Autohause, Romeo was there to greet my with kindness and respect. He called as soon as they had found the problem and made recommendations with openness and honesty on costings and timelines.
Fantastic customer service all the way through to the end. I will definitely be visiting Northside Autohaus for all my service and repairs from now on. Highly recommend Autohaus.
Nicola
Northside Auto Haus | The Warning Lights Audi and VW Drivers Should Never Ignore Vlado Markovic
09:41 18 Oct 22
Romeo and the team serviced my Audi A8 to my great satisfaction. This was second time I serviced my car here and I am as happy as I was first time. Quality work and friendly service that is hard to find these days. Would like to recommend Northside Autohaus to any Audi, BMW or VW owner.
Northside Auto Haus | The Warning Lights Audi and VW Drivers Should Never Ignore Martin Andrew
01:02 27 Aug 22
This week was our second annual service at Northside Autohaus, last year our near 10yr Golf TSI required some semi major servicing with water pump, belts, engine mounts etc (as to be expected with age and kms on the clock), thankfully this year a simple service, wheel balance and tyre rotation to ensure even wear and fuel efficiency, along a quick repair to the rear window washer water line which had broken in the section between the car body and tailgate (another semi common VW fault).

Romeo was helpful as always to discuss any issues or concerns with the vehicle, reach out and call to confirm once the team had inspected the vehicle and what they found, providing an accurate quote and ensuring the vehicle was ready that afternoon (with a clean and vacuum also completed!). Thanks Northside Autohaus for the great service.
Northside Auto Haus | The Warning Lights Audi and VW Drivers Should Never Ignore Kerem Koş
02:50 25 Mar 22
My Audi Q7 had a sticky and complicated problem. Jeff and his team were able to locate the root cause and fix it. The team was helpful and friendly. I am happy with the service and highly recommend them.
Northside Auto Haus | The Warning Lights Audi and VW Drivers Should Never Ignore 
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