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Re: Battery degredation

Posted: Sat Dec 29, 2018 5:36 pm
by fizzit
An update to my above post, about how my 2015 Spark w/40k miles has 14kWh of capacity:

I brought it in to a local dealership yesterday and they said they couldn't find anything wrong with it but they're going to contact GM engineering. The tech I spoke to said they had replaced 2 Spark EV batteries this year, which was surprising because I'm in Washington, where the Spark wasn't even sold. He didn't know the circumstances surrounding the replacements as he hadn't been the one to work on them, but he said one of the owners had been contacted by GM directly and told to get a battery replacement.

Re: Battery degredation

Posted: Tue Jan 08, 2019 12:08 pm
by TheLondonBroiler
fizzit wrote:An update to my above post, about how my 2015 Spark w/40k miles has 14kWh of capacity:

I brought it in to a local dealership yesterday and they said they couldn't find anything wrong with it but they're going to contact GM engineering.
SparkandBolt posted this last thread page and is worth looking into. I may contact a bolt dealer to see their willingness to check into it.

"Tech. details:

Tech found code P0D5700 stored in system, found bulletin with doc# 3225327 available. Tech followed the diagnosis chart system and performed testing on hpcm2 module. corrected by hybrid powertrain control module 2."

Re: Battery degredation

Posted: Wed Jan 09, 2019 8:47 am
by fizzit
SparkandBolt posted this last thread page and is worth looking into. I may contact a bolt dealer to see their willingness to check into it.

"Tech. details:

Tech found code P0D5700 stored in system, found bulletin with doc# 3225327 available. Tech followed the diagnosis chart system and performed testing on hpcm2 module. corrected by hybrid powertrain control module 2."

I did mention that to the service guy at the desk and he said that it would show a warning light for any codes. I've only seen it show the light once after L2 charging and it went away with a restart. I also checked for codes with torque pro but I don't know how exhaustive that is. Hopefully GM engineering will get back to them with any relevant tech docs or other resources.

Re: Battery degredation

Posted: Mon Jan 14, 2019 2:08 pm
by sparkandbolt
Some more data.. car wasn't driven as much for the past few weeks, battery capacity now shows 17.667 KWH, drove a lot today after full charge, ended up with following data points:

Distance: 58.9 miles
Efficiency: 3.9 Miles/KWH
GOM readings miles range left: 9 - 10 - 12
Energy used: 15.1 KWH - Implied capacity = 15.1/.85 = 17.76KWH
Driving & Accessories: 85% - Rest are 0%

It was mostly highway miles hence the efficiency, cold day about 34 degrees F. What a fun car this is!

Re: Battery degredation

Posted: Fri Jan 18, 2019 9:12 am
by TheLondonBroiler
I've decided I'm going to try to schedule an appointment with a reasonably close dealer that sells Bolts (hoping for better trained techs), to take a look at my Spark. During my first months of ownership, I had occasional idiot lights/DTCs, and having gone back this morning and looking at a Torque Pro screen shot, one of the codes was p0ac4, which could implicate an issue with the hpcm. Being that I'm down to 14.0 kwh, my 62 mile daily commute doesn't leave me with much leftover range in cold temps. I'll report back with the result.