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P1622 Error

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My son has a 2009 1.8 TDCI and went to start it earlier and nothing, didn't even crank, just said engine malfunction, a few tries later and it started and he made it home.

I plugged in Forscan and it says P1622 - Signal is above maximum threshold.

I did install a dashcam last weekend, I know the code has to do with the immobiliser but is there anything general which causes this? It only started today, seems to be intermittent.


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