After an hours drive last week the Morgan's engine light came on as I engaged reverse and backed into the driveway. Having plugged a scanner into the OBD2 socket I've two errors both stating 'Ambient Air Temperature Sensor Range / Performance':

Three questions:
1. Is this a common fault with the Mog (my searching suggests not)
2. Any idea why I'm seeing this?
3. Where is the air sensor located on Aero models?