I would check the brake lever. A while back I replaced my levers for shorter aftermarket levers and even though they looked indentical in design and bolted right up, the new brake lever threw a engine light just as you described. As soon as I replaced it back with stock it went away. I tried this atleast 3-4 times and every time it did the same. So very possible a small tweak of lever could cause your problem.
Also when you pull brake lever off you will see not only the plunger, but in front of it is a switch (black plastic piece). This is what I believe was my problem as the new lever clearance may have been off. Check this to make sure mud or dirt isn’t in this area which will cause possible clearance issue.
Hope this is of help.
Also when you pull brake lever off you will see not only the plunger, but in front of it is a switch (black plastic piece). This is what I believe was my problem as the new lever clearance may have been off. Check this to make sure mud or dirt isn’t in this area which will cause possible clearance issue.
Hope this is of help.