[Russo90]

Hi guys, i have a problem with my x3 F25 xdrive 2011 ,it was a rainy day and Eps error,driving stabilisation failure,flat tyre monitor error.I stopped restart the car nothing worked,the car was towed to the service 64 errors related steering torque,transmiter and reciever Eps.
Reseted all ,the car worked just fine untill next rain.I went back and they found the 3 wire that went to the electric power rack were broken and make shortcircuit on ground.The car worked fine the next 2 weeks ,even on rain,untill one morning.
When i start the car appears the messege with power steering and disapear.It was undervoltage error so i change the car battery.At the first start all good but in the first 10 meter an Dsc erorr apear and disapear.In the morning same Eps error.Any idea?

[pungo]

Welcome to the forum...
Without error code(s), it's hard to diagnose

[Russo90]

This are some of them.This were the second time they appear.

[pungo]

Originally Posted by Russo90

This are some of them.This were the second time they appear.

I'd start with the one that exists "undervoltage". What is the battery voltage?

[Russo90]

Originally Posted by pungo

I'd start with the one that exists "undervoltage". What is the battery voltage?

The battery is brand new ,14.7 with the engine running.

[pungo]

Originally Posted by Russo90

The battery is brand new ,14.7 with the engine running.

That's the alternator voltage, what is the battery voltage, measured at the jump studs after it's been at rest for many hours.

[tracer bullet]

Agreed to the above.

Also - how old is the battery? I might have missed it but if you didn't say yet, that could be a factor to share.

[Wgosma]

Originally Posted by pungo

That's the alternator voltage, what is the battery voltage, measured at the jump studs after it's been at rest for many hours.

What is the min/max Voltage one should read at the battery/under hood terminals w/o motor running?

[Opie55]

Originally Posted by Wgosma

What is the min/max Voltage one should read at the battery/under hood terminals w/o motor running?

I'd start to worry if it reads below like 12.3 volts, with 12.6 or so being good.

[pungo]

Originally Posted by Wgosma

What is the min/max Voltage one should read at the battery/under hood terminals w/o motor running?

https://x3.xbimmers.com/forums/showp...91&postcount=2

[Wgosma]

Originally Posted by pungo

https://x3.xbimmers.com/forums/showp...38;postcount=2

Memory fail….I'm getting too old!
Thanks/Bill

[Wgosma]

Originally Posted by Opie55

I'd start to worry if it reads below like 12.3 volts, with 12.6 or so being good.

My car hovers right at/slightly above 12.3V. I think I recall reading a couple of posts on the F30 forum that went into a bit of detail about the Intelligent Battery System/Sensor setup targeting to keep battery around 80% of full charge.

[Lucio_Libre77]

Did you fix the issue in the end?