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I recently got a replacement ecu as mine had the common water damage, plug and play job,worked a treat. However the electronic malfunction light(car/spanner) came on maybe 10 minutes after starting. Was never on from the initial start, always takes about 10 mims before it appears.

Went to a garage plugged it in an said it was the glowplug control unit. Tested plugs - ok, tested signal from ecu to control unit - ok, tested all the wiring - ok.

So i replaced the control unit for the plugs tonight and its just exactly the same, runs about 10 minuted and the loght comes on. Could this be an issue with the new ecu? Or does it need to be plugged in to clear the fault?

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