Skip the auto shop - Our mechanics make house calls

Q: Failing fuses, dashboard warnings all present - 2012 Audi A7 Quattro

asked by on

My air conditioner quit working in my A7. It wasn’t blowing out any cold air. So I decided to check the fuses. I took them all out to check them, then put them all back in. This caused the computer system to go crazy! My power steering quit working. The speedometer quit working. The driver door controls quit working, and it seems like all the warning lights are on. Do you know what I did to cause all of this and how I can fix it? I hope it’s not too hard to do.

A: Your Audi utilizes an electrical power dist...

Your Audi utilizes an electrical power distribution system which is more computer network like, than older point-to-point wiring systems. There are electrical controllers at key locations in the vehicle (front or back) which distribute power to components located close by, rather than route power all over the vehicle. It is possible that one or more of these systems has not "power-on-reset" correctly, or has been damaged. I would have an Audi electronics-trained professional check out your vehicle.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Engine shudder while driving, burnt rubber smell

Hello. Most of the time, this is the first indication that the timing belt is failing. The timing belt needs to be checked to see if it is going bad. If the belt is fine, then you may have a...

Q: Blower motor issue

Hey there, thanks for writing in. The blower is controlled by the blower resistor/controller and the controller is controlled by the climate controller. You replaced both of these but one of the two is shorted causing the blower to be...

Q: How can I reset the computer

Unhooking the battery and jumping the positive and negative terminals should clear any trouble codes. Be sure to unhook both as this can be very dangerous if not done properly. If not experienced in doing this, I would recommend...

Related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...