Why is my revs go up and down while idle? Astra 1.7 CDTI 2011

Why is my revs go up and down while idle? Astra 1.7 CDTI 2011 why does my revs go up and down while idle? Astra 1.7 CDTI 2011
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mcgyver89 [Entry]

Jonas Kavoliunas could be caused by a lot of issues from faulty O2 sensors to MAF etc. The best way to start the troubleshooting would be to have the OBD scanned to see if your Astra is throwing any codes.