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Hi, try what I suggested a few posts above.

Seemed to work fine for mine. Still not had any repeat errors since then!

Just loosened all the earthing points that I could find in the engine bay and used some spray switch lubricant to clean them. Then did them all up again.

Try that and reset the codes and see if it comes back. There are lots of earth points on the left and right side panels, also near ECU and at least one large one on the engine block or gear box.

Hope this helps