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If the check engine light comes on in your Audi A4, the first step is to pull over safely and stop driving. The next action is to use an OBD II scan tool to access the stored codes in your ECU that triggered the light. A P2015 code indicates an issue with the runner position sensor on bank 1 of the intake manifold, used to track the opening and closing of the intake. Symptoms of a faulty sensor include rough engine operation and potential misfires.
The P2015 trouble code on an Audi A4 from 2015 refers to an issue with the intake manifold runner position sensor/switch circuit range or performance in bank 1.