Wonky... now that is really
cold. But alright resetting the ECU is something like insert the key and turn it to on, but don't actually crank it. Leave it in the "on position" for about five seconds then turn it off. Leave if off for about fifteen more seconds then turn it back to on for another few seconds before actually cranking the engine over.
Ok I went ahead and looked up some other threads to verify this, and there's a post over at NewX that is much more complicated on how to reset but it might work for you. Here's the link
Hope that helps!