Fault Warning

[Jbrew00]

2016 Mojo
Fault warning SPN:168 FMI 15
Seems to be a voltage problem but could use some help.

[Holdmybeer]

High Battery Voltage fault.

Either your batteries are going bad, or you drained 1 (or both) past alternator recovery and it is working double time trying to catch up. This will burn out the alternator, unless it is already bad, giving you the high voltage fault.

Check battery voltages on each and then use the charger to charge them. I suspect one is going to be real low. If they charge fine and the lights all go green and do not show faulted, then try to run it and see what happens. You will either get a 13.5-14.5 volts on the display (normal range) or you will see 16+ volts and that will indicate the alternator is bad.