Your Audi A6 Quattro is equipped with an air mass meter that measures the flow and density of the air flowing into the combustion chamber. This engine component regulates the ratio of air to fuel. So when this part becomes defective, better pop up the hood and do some troubleshooting. Listed below are the reasons behind Audi A6 Quattro air mass meter problems.
If you experience hesitation when your car is accelerating or if you encounter rough idle, then better check up your Audi A6's air mass meter. You see, poor idle is usually a result of a bad air mass meter. To check if it has become defective, simply inspect the computer diagnostic codes. Diagnostic scanners are available at most auto shops, so it wouldn't be really hard to buy one. Recurring failures are usually a result of poor maintenance. Water and dirt particles can enter the air mass meter's intake tube, so regular cleaning should help extend its lifespan.
Sometimes rough idle is not a result of faulty air mass meters, but is caused by leaks in the intake hoses. When theses hoses are damaged and leak out, it causes the air mass meter to incorrectly read the amount of air. You see, replacing or repairing the Audi A6's defective air mass meter will not do you good if the damaged hoses are not replaced first.
When your Audi A6's air mass meter is defective, it will fail to give out any signal to the car's ECU and would let the car switch itself into limp mode. You see, an auto in limp mode restricts your engine so that it will not rev up beyond the pre-programmed speed. This loss of power makes the car barely drivable.
Often times, a faulty air mass meter will show symptoms similar to almost every other car part failure. You may experience rough idling and acceleration or even stalling. Usually, car owners would suspect the fuel system or the spark plugs, but the real culprit could be the air mass meter. A defective one sends incorrect readings, so the ECU mixes the wrong amounts of fuel with air. As a result, several engine problems occur.