Audi A3 Common Problems and Solutions
You may have noticed that when you are driving over speed bumps, or rough surfaces, that there is a knocking noise coming from the suspension. This problem is usually caused by the track rod ends being broken.
Fitting replacement track rod ends will fix the problem.
DPF warning light
If the DPF (Diesel Particulate Filter) warning light has appeared on the dashboard, then it is usually caused by a blocked DPF, due to the car only being driven around town. This means that the DPF is unable to reach high enough temperatures ,to be able to burn off the unwanted particles. This results in the DPF becoming blocked.
You need to take the car out onto a motorway and drive it in 4th gear, at about 2500 rpm for about 10 miles. This will allow the DPF to get hot enough, to be able to burn off these unwanted particles. This in turn, should cause the warning light to go off on the dashboard. Have a look at the video below, for an idea on how to do this:
Engine management warning light
If the engine management warning light has appeared on the dashboard, it is usually caused by the coolant temperature sensor. If this is the problem, you may also notice that you are having trouble starting the car when it is warm, or are getting strange temperature readings.
You will need to replace the coolant temperature sensor, in order to resolve this issue.
Oil leak on diesel engines
If you have noticed that there is an oil leak on the floor, then the usual cause is a broken turbo pressure pipe seal.
Changing the turbo pressure pipe seal will solve the problem.