Fiat 500 error code u1726

[Juggers2k]

U codes seem to randomly appear on some vehicles when there is a glitch in CAN communications.
If you clear them and they stay away, they're generally nothing to worry about.
If they keep coming back, it might be worth checking connections on the CAN lines.

[edenwell1]

u codes normaly appear when battery voltages get low and can systems struggle to operate, make sure battery charge rate is good and battery is fully charged