Multiple Errors - Parking Brake, Suspension, Fun!

A while ago, but after all of the battery education ..did you ever figure your two code issues out? I get the axact same two codes and curious if you ever resolved U0421-68 and C1A13-64?

Hey there so it’s been a year (close enough) since those occurred and in that time I never wound up replacing the alternator and once I started driving longer distances the battery system was maintaining proper charge and the voltage was at an appropriate level on it’s own.

The dynamic power system remains a mystery to me but it is working.

The EPB code definitely still happens and the brake has failed / locked on me multiple times randomly now so I’ve gotten quite proficient at being able to manually release it. I will have it serviced the next time I do brakes overall which I suspect will be soon.

Now as to the air suspension, I still have not done any work there but once the battery was settled I will say that it was behaving much better. Once in a while it will throw a fault when I use access height but overall it has been fairly stable which is why I haven’t replaced anything yet. That being said it’s on my list to address BEFORE something happens.

I hope that info is helpful in some way, and if there’s anything specific I can tell you just let me know.

Thanks so much!! I am about to pull my rear disks and do a thorough EPB parts clean and adjust. After lots or reading I am pretty convinced that a proper adjust/clean solves most EPB issues

And my susp code keeps coming but only rarely do I get the dash error and warning to stay below 30. So I think I will buy 4 LR ride height sensors, install, clean connections, do setup with GAP and start there...

Will post my results on this chat!

Randy