Ecu er-4, fuel light blinking 8 times, immobilizer light
 

Hi everyone.
I recently have bought a xt660x and I have some issues with her.
When I try to enter in diag mode I get er-4 and I don't know if as any relation with the immobilizer light always blinking. The motorcycle works with this error.
About the fuel light I think I can manage the problem, i already take off the fuel pump and i found a bad termistor, im gonna exchange for a new one ntc 1k ohms, i place the result later.
I will appreciate your help, tks.