Sudden 75% Vary Loss (2014 Volt)

A couple of week in the past my beloved Volt skilled a sudden lack of 75% of its vary. I have been sifting by way of boards looking for any related conditions with out a lot success, and was questioning if anyone’s skilled one thing like this/what the difficulty is perhaps.

This is what occurred:
I went out to run some errands on a temperate night with the automobile on a full cost of 42 miles. After reaching one in every of my stops, the battery was just a little over half full and the vary was estimated within the low 30s, every thing wanting and behaving nicely. Half an hour later, I returned and the battery was nonetheless half-full – however the vary had dropped to five miles. Driving in EV mode depleted the battery and vary proportionally right down to about 30%/3 miles. Once I acquired the automobile dwelling, I shut it off and waited a couple of minutes, then turned it again on. The battery readout doubled from earlier than and said 6 miles of vary (That is the one time I’ve seen an enormous “bounce-back” like this). I plugged it in and the charging estimate (110v) was solely an hour. Checking on it after that point had handed, the automobile had pushed the charging window again one other hour. Within the morning, the automobile had absolutely charged and was exhibiting a 9 mile vary. Since then I’ve pushed the automobile round largely in Maintain mode and observed that the engine is operating more durable and extra usually than standard. The battery additionally appears to lose extra cost in Maintain than standard. The automobile has no warning lights or messages. There was no work performed on the automobile just lately apart from an alignment a number of months in the past. It has been useless dependable and constant up thus far and has 43k miles on it.

It has been on the supplier for a number of days and this is what has been performed since then:

  • I advised checking the 12v battery primarily based on some discussions on the discussion board. The battery examined unhealthy and was changed, however this didn’t repair the difficulty.
  • Supplier ran a scan for any error codes and did not discover any, and plans to run exams on the charging system and hybrid battery.

I am considering that there’s something nicely and actually improper with the Voltec system, however the 12v battery coincidence, unusual capability conduct, and lack of a CEL (which I really feel like would have come on with this a lot vary loss) is throwing me off and making me marvel if there is a system that is simply massively misreading the battery. Has anyone skilled something much like this? Is there something I’d have the ability to level the supplier to as a potential wrongdoer or ought to I be bracing myself for a hybrid battery alternative? I am grateful for any insights and ideas.


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