I'm thinking I'm glad my 2017's BECM was replaced a couple of years ago as part of my cruise control engagement issues.
The preferred state for long term storage of the car is for the HV battery is to be below 50% charge. Considering he was likely unable to charge the vehicle due to BECM failure, I assume it is likely low on charge. He should be fine (other than a possibly dead 12v battery...)Does anybody know whether the main pack would deteriorate if left in the lot for an extended period not charged
Did your BECM go out too?OK, so update time. I took into my local dealer to diagnose; they say one of the battery modules is defective. I assume one of the sections went bad as I don't have the paperwork, new battery parts on order, 7-10 days ETC. Crossing my fingers.
How did they determine it was the BECM with only a check engine light? When was your 2018 built?Mine failed on my 2018 at about the same time as yours.
Only symptom was the check engine light was on, car acted normally otherwise.
Got replaced under warranty, no charge.
Does not make me feel better about the Volt longevity/reliability overall.
Just an update to my situation with the BECM. After 5ish weeks I still have no ETA on the par. For those concerned about having no vehicle while you wait, forget what your dealer says and call GM. If its covered under your Voltec Warranty GM will cover a rental car but you have to go through the dealer. Once you tell this to the dealer they will suddenly have access to a loaner for you since they can just bill GM for thge rental costs to give out the loaner. I will say though after 5 weeks with a 2021 v6 Blazer, I am definately feeling the pain at the pump. Cant wait for this to be over with.Just had this happen to my 2018 LT @ 49,000. Check engine light one day followed by a no start condition. After switching to neutral, I was able to start the car. Engine imediately fired up with 0 miles of range but full battery. At dealer now with no eta on the BECM.
Definately do not hold onto this car after the Voltec warranty expires. Way to much risk from outright cost to repair, to the amount of time it takes to get EV specific parts.Did your BECM go out too?
I love my 2018 but it seems like it's a ticking time bomb. I may trade-in before the warranty expiires - only 4 years left. No issues about the BECM on carcomplaints though. Probably not many people use it.
The dealer is wrong about the loaner. Call GM and they will confirm that you are eligible for rental reimbursment but will need to start the process directly through the dealer working on your car. Once you tell them that, they will magically have a loaner for you since they can charge GM for the usage.First comment, my BECM on my 2016 Volt went out 2 weeks ago. It has just over 40K miles. I was getting the shift to park error from time to time so I wanted to get that fixed so I got two birds with one stone. Although it been in the shop for almost 2 weeks now. No parts have been found yet. They said it is on “National Backorder” and no loaner car. So I am having a blast getting a ride with my wife.
the dealer mentioned they have another Volt there, also a 2016 waiting for the same part.
Hello MaryCAFor what it’s worth… I just found out today that they now have the part… 7 week wait. I’m selling when it’s fixed. Don’t trust this car anymore. Unfortunate because I really liked it for the first two years
Year of the car ( in service date) Not sure of In service date but it is a 2018Hello MaryCA
I am a concerned with this BECM issue and trying to gather so background information before it failed.
Year of the car ( in service date)?
mileage ( km / mile ) ?
percentage ( electric/gas)?
type of driving ( % on Highway/city)?
charging ( 120v Level1 / 240v Level 2)?
environment ( parking outside / garage)?
Climate ( state/province)?
Thanks for posting this, it helps everyone who drives a Volt.