Don't worry mate, it happens often!
It isn't the end of the world and there are lots of threads on here to tell you how to sort it. It happened to me on holiday in Scotland after I thought I'd fixed it, so had to drive with it for a fortnigh!
If it came on suddenly, unexpectedly and you hadn't done anywork on the hubs recently, we can narrow things down for you.
Do you have Hawkeye or Foxwell or summat? as you really need a diagnostic to save time.
But as a basic you can go round all the plugs in the wires to the sensors and see if the connections are sound. If you test them with a meter set to resistance, i.e. unplug the wire and test the bit that goes to the sensor, you should find the values all much the same. If you have a totally non reading on one then that could tell you you have a break in the wire to the sensor from that point on.
Try looking at the sensors to see if one has come loose.
This is often caused by a hub wearing, the reluctor ring therefore moves too far relative to the sensor and this will set the amigos glowing. so you are right to ask for a member with a reader to tell you which one is playing up. My Foxwell does it fine and apparently so does Hawkeye, but nanocom has a habit of telling you about the wrong sensor and a garage did that to me too, forcing me to buy and fit a new hub to the wrong end of an axle. which is why I bought a Foxwell. See here
https://www.google.com/search?ei=f6...hUKEwjO0_n-n4bqAhWfUhUIHdaGCUIQ4dUDCAw&uact=5
Mine's a 520 and I am very happy with it.
Meanwhile here is a lot of reading
https://www.landyzone.co.uk/search/105868105/?q=3+amigos&o=relevance&c[node]=8
Best of luck mate. (Fellow Yorkshireman but from Hull originally, now in East Dorset)
