P0303 Audi -

Question

whats the most common problem when a code po303 occurs and how to fix it

Answer 1

HI there,

The most common issue with this code would be a bad ignition coil or plug wire on cylinder #3. The code means there is a misfire on cylinder 3. The P0300 code could be a result of the #3 misfire as well. If the computer can't tell which cylinder is misfiring, it's going to give the 300 code.