GTW_w026:
I've seen other threads that include this warning code, but those seem to have multiple codes and don't really help explain this one in particular.
So I'm starting this new thread to share my current situation, and see if anyone has any new info or developments on it.
I bought my '15 MS 70D a couple months ago used from a dealership. (AP1, MCU1, original 70 battery)
When I started getting this service warning, only a week or so after buying it, I reached out to SC. They said it was related to the battery coolant heater.
But I decided to cancel the trip to SC and look on here.
I've seen other threads saying it could as simple as a loose negative post on the 12V battery. I checked that, unfortunately not it.
So I have been paying attention to when this warning pops up.
At first it seemed random because it wasn't every day. Only seemed to happen on my morning commute. (I do schedule preconditioning, garage kept)
The frequency has started to increase a bit in the last week, but I've isolated it to a particular scenario:
The warning only pops up at the end of regen braking (10 mph), and usually only from +45 mph.
This is normal, gradual braking, not full 100% regen, as I always ease off the gas to lessen the pull a bit (set to standard regen) and lengthen the braking distance.
So slowing from 45+ mph to 10 mph will cause the warning to come up. So far, that's the only time it pops up.
Does anyone know why this particular action would trigger a warning, supposedly related to the coolant heater?
Or does the SC just not know, and gives any reason so they can get the service visit scheduled?
I can try changing the regen to low just to see if it matters, but I do prefer it at standard level.
I've seen other threads that include this warning code, but those seem to have multiple codes and don't really help explain this one in particular.
So I'm starting this new thread to share my current situation, and see if anyone has any new info or developments on it.
I bought my '15 MS 70D a couple months ago used from a dealership. (AP1, MCU1, original 70 battery)
When I started getting this service warning, only a week or so after buying it, I reached out to SC. They said it was related to the battery coolant heater.
But I decided to cancel the trip to SC and look on here.
I've seen other threads saying it could as simple as a loose negative post on the 12V battery. I checked that, unfortunately not it.
So I have been paying attention to when this warning pops up.
At first it seemed random because it wasn't every day. Only seemed to happen on my morning commute. (I do schedule preconditioning, garage kept)
The frequency has started to increase a bit in the last week, but I've isolated it to a particular scenario:
The warning only pops up at the end of regen braking (10 mph), and usually only from +45 mph.
This is normal, gradual braking, not full 100% regen, as I always ease off the gas to lessen the pull a bit (set to standard regen) and lengthen the braking distance.
So slowing from 45+ mph to 10 mph will cause the warning to come up. So far, that's the only time it pops up.
Does anyone know why this particular action would trigger a warning, supposedly related to the coolant heater?
Or does the SC just not know, and gives any reason so they can get the service visit scheduled?
I can try changing the regen to low just to see if it matters, but I do prefer it at standard level.
