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A6 Quattro

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Question
I have 05 audi a 6 Quattro 4.2. I sprayed the engine off one afternoon. Now I'm getting primary/ secondary circuit malfunction sho
This is a common problem with the Audi models. Generally one of the advantages to having coil packs instead of a distributor is that they are a little more water resistant, however this is a known issue with Audi in...
Question
Death in the A/C
Hello, thanks for writing in about your Audi A6 Quattro. You should remove the A/C blower motor and see if a mouse or rat got into the A/C system if the smell is as bad as you're describing. They can...
Question
Engine is leaking coolant on the top of the engine
This sounds like potentially a blown head gasket unfortunately. I would definitely not start or drive the car any longer until having it checked by a mechanic. When this happens, the gasket between the cylinder head and the engine block...
Question
Are there two timing belts in the Audi A6 engine?
The timing belt drives the intake cams on both sides of the engine. There is just one belt. The intake and exhaust cams are connected by a small chain and generally do not need to be replaced. However when replacing...
Question
Misfire on cylinders 1&4
It sounds like it could be the harness and simply disturbing it by swapping connectors eliminated cylinder #1 from misfiring, for now. Having owned a few VAG products and having many friends with them, you might want to try a...
Question
How to take starter off?
Hi there! Prior to the turn of the century, replacing a starter on most vehicles was a rather simple process. However, as engine technology has evolved, and more electronic sensors added, trying to remove a starter without removing multiple ancillary...
Question
Car floods, have to pull fuel pump fuse to start
Hello. If your car is throwing over 20 codes, then I would stop driving the vehicle and have it serviced as soon as possible. That many codes at once is a potential indicator of a serious issue, even if the...
Question
What outher audi seats will bolt up an fit in my car
Hello. The main concern would be the compatibility of any sensors (e.g., air bag) that might be integral to the seat as well as the compatibility of the power seat controls, plugs and so forth. There are several way to...
Question
P0421 comes up on scan. What is the likely culprit
Hello. When you get the P0421 code, it usually means that you have a failing catalytic converter. It is very common for converters to fail on this vehicle over time. Most of the time I use a scan tool to...
Question
My car is being serviced and the mechanic just advised me that my brake pedal goes all the way to the floor,
Hey there. You may have a brake leak or be low on brake fluid. However, if you are low on fluid, you may have a leak. Brake fluid does not go anywhere therefore is should never get low or become...
Question
Transmission indicator on the dash board does not point to the current position, plus the Tiptronic gear does not always work.
Hello. The issues you are experiencing can be caused by a variety of issues. It may be possible that there is some sort of sensor or computer issue. In certain cases a faulty transmission switch or shift solenoid will cause...
Question
My audi smells like gasoline I read it could be a clogged fuel filter my mechanic wants to replace a plug on my fuel pump
What your mechanic says sounds more likely. There is no gasoline flowing to the turbocharger, so a flange or gasket leak is unlikely to be the cause. A leaking turbo flange would give you an exhaust leak and any odor...
Question
When does cam belt need changing? It's a V6 2.8L Quattro though
Hi. Your car is running a timing chain and the timing chain is not a part that has to be replaced according to Audi. This is a good thing because most of the time the timing chain last for the...
Question
Coolant fan runs continuously? What can it be?
Hello. Most of the time on this vehicle the issue is caused by a failure in the fan control module. It typically has an internal short that causes this. I usually test the circuit to make sure that the computer...
Question
My Audi revs but will not drive in reverse. The ABS light is on and the brake light flashes on the dash. What could be the cause?
The transmission needs around 100 psi pressure to operate all of the forward gears, but it needs 180-190 psi pressure for the reverse gears. The transmission pump is designed to create 1000 psi of pressure and it is regulated...
Question
When the weather is nice outside, the car start fine. When it is cold, the car refuses to start until I try it several time
Hello, the first step in resolving this problem is to determine if there are any problem codes set by engine management - even if the Check Engine light is not illuminated. Most auto parts supply stores will check this for...
Question
How do you get access to replace the O2 sensors on a Audi A6 4.2 engine? There does not appear to be any room?
Hello. In order to remove the oxygen sensors, you will likely need an offset oxygen sensor wrench. An offset oxygen sensor wrench will be compact enough to fit into low clearances but still provide enough torque to break the sensors...
Question
Hazard light staying on
Hello. From what you describe, it would appear that your vehicle may be experiencing issues with the hazard button. If the button is buzzing and causing the lights to malfunction that may be an indicator that it is sticking, or...
Question
When I hit a little bump or pot hole on my right passenger front side, it feels like it skids a bit
The A6 has some pretty large bushings in the lower control arms. Especially the ones toward the rear of the arm. When those bushings wear out, the rear of the control arm can flop around quite a bit, changing all...
Question
Battery replacement.
It is not necessary to use the exact same brand of battery that the vehicle came with from the factory. Although, it is designed specifically for your car it is not required in order for the car to function properly....

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