[somms]

Count me as being on board for WOT's preventative measure solution for this Gen1 lingering issue. I would much rather avoid having to make the 'drive of shame' into the GM service dept. just to have the HPCM2 reprogramed in order to clear the latched DTCs caused by a failing sensor!

 

[somms]

My ELR has a 40-month/50k B-T-B warranty. Why would I do this before it is out of warranty?

I suppose you would order WOT's Coolant Level Sensor then simply install it? If you follow his detailed instructions there should be no reason to visit the GM service dept.

 

[somms]

Rather odd that this Chevrolet Customer Svc account is radio silent for the last 3 weeks and then suddenly decides to pop up in this thread?

Morley Companies, Inc. Employee Reviews for Chevrolet Volt Advisor

From what I understand, this account is shared between the staff contracted by GM to operate the Volt/Spark/ELR Advisor team(s) and aren't GM employees. I hope there would be no need for lawyers.

 

[somms]

Checking in to let WOT know the plug has been received and installed on my Gen1 as of this morn.

My Volt is now charging following lifting the negative terminal off of the 12V AGM battery directions from the instruction notes resulting in success with NO DTCs currently latched!

 

[somms]

Any idea if it is simply a normally open or normally closed type of switch? If working and normally closed, install a green led, if normally open, install a red led.

Just a thought.

From what I understand, this battery coolant level sensor is a resistance value rather then normally open or closed type circuit.

 

[somms]

OK, so is this the plug I need to remove? And where do I insert the defeat plug? Into the coolant tank part, or the loose dangley plug?

WOT's plug is intended to take the place of the sensor in your pic so you would disconnect the sensor and then insert the connector into his plug and then tiewrap it back onto the loom out of the way using the single tie wrap that was enclosed. I just ended up leaving the sensor in-place but you could also remove this if you wish...

 

[somms]

Out of curiosity (sorry if I've missed it and this has been asked and answered), how does the sensor work if there is no contact with anything. Is it capacitive?

WOT explained in earlier posts that the sensor resistance output is based on how it detects the level of the float in the tank thru a magnet I believe...

 

[somms]

Maybe he's on vacation? I sent payment on July 20th and haven't heard anything at all.

AFAIK, WOT handed this project to fill these orders off to his son a while back. I have ordered 2 defeat plugs 2 seperate times and got the orders in a couple of weeks time...

 

[somms]

So my only option is to bring it to the dealership?

https://gm-volt.com/forum/showthread.php?305009-VCX-nano&p=4312369#post4312369

FWIW: Cost of the VCX Nano or similar and $40USD per VIN/2yr GM SPS subscription will give you access to the same GDS2 diagnostic tool and calibration update service the GM service dept Volt techs would use in order to troubleshoot this issue...

 

[somms]

I tried disconnecting the 12v battery and pulling the high voltage plug under the center console for 10 minutes but no go. Is there anything else I missed or will it take a trip ($$$) to the dealer to reset the modules?

24 months access to program all modules for one vehicle (VIN) GM SPS subscription + VCX Nano = reprogram HPCM2/clear latched code yourself