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    4. : How to reset code 21 on the Opel Astra J?

How to reset code 21 on the Opel Astra J?
Years 2009-2016

Answer

Code 21 cannot be manually reset but disappears by itself once the problem that generated it has been resolved. As it indicates a malfunction of the left front position light, it is usually sufficient to replace the bulb.
Posted on: 13 August 2022 by ScegliAuto

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