Try unplugging the Mass Airflow sensor and see if the car runs better, if it does replace the MAF sensor. It is located in the air intake hose to the engine.
SOURCE: 2004 Audi A4 ck engine keeps coming on car seems to be doing ok
do you have any special modifications done to the car. Air Filter anything.
SOURCE: Audi A4 2002 Bulb Replacement/Manual/Wipers
The bulbs and wipers you can call most any auto supply source and they can give you that may be able to download manual online from audi or contact an audi parts department.
SOURCE: Have an audi a4 1.8T Cabrio. Battery went dead,
I had the exact problem with my A4 2001 1,9 TDI but i just turned the car on, then first turned the steering wheel to the left as far as it goes, then to the right (i dont know if this is necessary but this is what i did). After i drove for few meters,the light went off and it worked normally.
SOURCE: Code P0118 on Audi A4 - Related to Ignition Coil Problem?
Hi, the sensor on the engine (right at the rear end of the cylinder head) has two separate outputs. One drives the temperature gauge and the other provides data for the engine control unit. The output for the engine control unit is almost certainly faulty and the sensor will need to be replaced. It isn't an expensive item and's not time consuming to replace (1/2 hr) - so you could ask Audi to do it for you when they replace the ignition coils.
Hope that helps Matt..
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