1.8L Turbo Readiness Code
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VAG 1551 scan tool is necessary for clearing codes. Follow manufacturer's instructions for clearing codes. After clearing codes, it is necessary to generate a PCM readiness code. A readiness code resets specific values to zero. Follow scan tool manufacturer's instructions for generating a readiness code.
NOTE:
On A4 1.8L turbo and A6 models, it is necessary to adapt the throttle valve control module to ECM if ECM memory is cleared or ECM is disconnected from battery voltage. Turn ignition on (engine off) for 10 seconds.