Recall notice concerning range estimation

[PhilPen]

Today I got a letter from GM concerning a recall for my 2015 Spark EV. The recall concerns erratic behavior of the state of charge indicator. Apparently due to high voltage battery state estimation errors the car can display an overly long remaining range to the driver... then on subsequent restart (after a few hours of parking) the range may have apparently significantly dropped (this hasn't really happened its just now displaying the correct value). I have never experienced such problems and am reluctant to take it in when everything seems perfect. Recently I heard of a problem with the Bolt displaying too much residual range, I wonder if that problem and its fix prompted this Spark EV recall.

[CCIE]

I got the same letter yesterday. I probably will bring it in since it's just an HPCM2 update. Shouldn't take them long to do it.

[beez]

I'm going to wait until there's more information. I don't have any problems that I can tell. Other than its optimistic re:highway range. At 70+ it seems to use up 30 miles of estimated range to go 20 miles. I figure that's normal, as it predicts range more upon a city cycle.

Given the buggy software that already lives in this car, I'd rather stay with the problems I have come to know and love, rather than give them a shot at introducing more.
Chris

[beez]

Additional thought: although the timing seems coincidental, the bolt issue results in a battery pack swap. Ours is a software update. Related? Maybe not.
Chris

[whomadewho]

# 17059: Customer Satisfaction Program – Range Estimation Incorrect – 2014-2016 Chevrolet Spark EV

Full details of the issue have been posted online here:
https://gm.oemdtc.com/7882/17059-custom ... #more-7882

We got our notification in the mail on Wednesday.

Edit: Sorry it didn't get pasted as a working link before, fixed!

[SparkE]

Here's a link you can click on :

https://gm.oemdtc.com/7882/17059-custom ... #more-7882

[didget69]

Is this considered to be an abnormal reading?



Dealer performed the SW update yesterday - we'll see how it goes.

bnc

[MrDRMorgan]

Is this considered to be an abnormal reading?



Dealer performed the SW update yesterday - we'll see how it goes.

bnc

I would not call it abnormal at all - enjoy it! I drive my 2014 Spark EV (almost 12K miles on the ODO) mainly in town at about 40-45 MPH and in L. Recently I have been seeing 110 miles on the GOM after a full charge. I know this will drop if I have to use the AC too much and when winter gets here and I have to start using the heater. The heater is a real range "KILLER" but you learn to work with it.

[evboy]

I got the same letter yesterday. I probably will bring it in since it's just an HPCM2 update. Shouldn't take them long to do it.

what exactly is this hpcm2 anyway. is it something that needs to be updated anyway like windows or android

[CCIE]

I got the same letter yesterday. I probably will bring it in since it's just an HPCM2 update. Shouldn't take them long to do it.

what exactly is this hpcm2 anyway. is it something that needs to be updated anyway like windows or android

Hybrid Powertrain Control Module 2. There are several computers that run the various systems in the car. But, HPCM2 is the main one. It runs proprietary GM code. Updates are sometimes required, but not often.