2.0L turbo charged engines may develop a hesitation on acceleration and/or illumination of the Check Engine Light due to a failed high pressure fuel pump or a worn camshaft follower or camshaft. Our technicians tell us that whenever the high pressure fuel pump is replaced the camshaft and the follower should be checked for wear. The camshaft lobe pushes on the follower to operate the high pressure fuel pump. Frequent oil changes and use of synthetic oil may help with this wear issue.
Problems for specific Audi A4 years:
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Most reported Audi A4 problems
Fuel quality must be maintained to avoid engine misfire problems; the misfires may cause the Check Engine Light to illuminate.
Clogged sunroof drains can allow water to enter the interior and accumulate under the carpet where various control modules are mounted. Over time, the accumulated moisture can damage the control modules.
wipers will only work for 4 swipes then stop at any spot after a delay it will go 4 swipes ect. no matter in what position the lever is in
Backside of steering there is a digital display which have all meters etc. When I put the key and start the car some times I am finding car symbol. In that car symbol front (bonnet) shows red blinking. Please let me know what is the problem