GM Volt Forum banner

1 - 20 of 32 Posts

·
Registered
Joined
·
14 Posts
Got in my 2013 volt this morning to go to work, go the "service high voltage charging system" error code. What exactly does it mean? New charger needed?

Battery coolant level is fine.

I'm at 145k miles so I'm guessing out of warranty or would this be included on the 150k voltec warranty?

I have only had the car for a couple months :(
 

·
Registered
Joined
·
1,997 Posts
Could be many things. Go to Autozone and get the codes.
 

·
Registered
Joined
·
14 Posts
Discussion Starter #5 (Edited)
codes are

P1e00
P0aa6
P1fff

edit: I was able to reset them with torque and my bluetooth tool despite being told it's not possible.
So I just order that sensor bypass and the problem should be solved?
 

·
Registered
Joined
·
14 Posts
Discussion Starter #7
Thanks, I wonder if it's just a software bug or my battery is going bad. I guess if it's an issue with the battery It would come back soon.
 

·
Registered
Joined
·
14 Posts
Discussion Starter #8
So I bought the sensor bypass and I was good for a day after installing it, but today it just threw the same 3 codes.

Does that mean it's the battery that went bad then?

I'm going to schedule a visit to the dealer, so i guess i should plug back in the battery coolant level sensor? Unhook the ground and all that again?
 

·
Registered
Joined
·
3,179 Posts
So I bought the sensor bypass and I was good for a day after installing it, but today it just threw the same 3 codes.

Does that mean it's the battery that went bad then?

I'm going to schedule a visit to the dealer, so i guess i should plug back in the battery coolant level sensor? Unhook the ground and all that again?
Any modifications you've done to the car need to be undone, and quickly. This is so the dealership can't claim those modifications caused the problem.
 

·
Registered
Joined
·
1,206 Posts
If it is related to the coolant sensor going bad, the codes appear to be cleared but they will return. There is a module that has to be reprogrammed/reflashed to clear them permanently. FYI, I have had the defeat plug installed and have had the car in and I don’t believe anyone has even noticed or clued in. I lost the original sensor too so I don’t have one to put back in even if I wanted to. Explain to the dealer you are aware of the sensor issue and that you have done what many others have done to avert a costly and unnecessary repeating repair due to the high failure rate of the sensor. Show them the 520 or so comments on this forum about it and that WOT who created the fix is a GM mechanic certified on the Volt.
 

·
Registered
Joined
·
14 Posts
Discussion Starter #11 (Edited)
If it is related to the coolant sensor going bad, the codes appear to be cleared but they will return. There is a module that has to be reprogrammed/reflashed to clear them permanently. FYI, I have had the defeat plug installed and have had the car in and I don’t believe anyone has even noticed or clued in. I lost the original sensor too so I don’t have one to put back in even if I wanted to. Explain to the dealer you are aware of the sensor issue and that you have done what many others have done to avert a costly and unnecessary repeating repair due to the high failure rate of the sensor. Show them the 520 or so comments on this forum about it and that WOT who created the fix is a GM mechanic certified on the Volt.
The codes appear to be cleared but they return once they are there? That seems odd, I thought I read they can't be cleared? I guess I'll go uninstall the sensor then and hand GM a few hundred bucks to clear the codes.

I'm planning to sell the car next month. So should I have them go ahead and replace the sensor, then bypass it when I get it home?
 

·
Registered
Joined
·
3,590 Posts
quick into
As many getting this - the trigger may be

1. the Hot weather causing a false trigger of the sensor or harness that got added to 2011-2012 Volts

2. old 12 volt batteries

3. LOW coolant ( but most of us check that and that is NOT the reason)

-------------

A. There is a service report on getting replacement NEW sensor and cable
BUT like many dealer items you must have the problem before that will install .


B. reports are that to just clear - you need to re-flash/program a module AND clear/reset some codes
not just clear codes

Links are in the other post but will link them here later.
-----------------
I plan to do 12 volt battery first as it is 7 years old and a dealer re-programming and code reset
then wait and see about sensor/cable.
 

·
Registered
Joined
·
3,590 Posts
https://static.nhtsa.gov/odi/tsbs/2013/SB-10052204-6977.pdf

Bulletin No.: PI0961A
Date: November, 2013


"Scan modules HPCM2 has codes. P1FFF and P0AA6 current.

Scan check data. Isolation resistance is ok, at 325k ohms.

Perform update on BECM and HPCM2 as per bulletin PIC5920.

Also replace Coolant level sensor for high voltage battery pack with updated unit for P1FFF.

Bulletin PI0961."
 

·
Registered
Joined
·
14 Posts
Discussion Starter #15
https://static.nhtsa.gov/odi/tsbs/2013/SB-10052204-6977.pdf

Bulletin No.: PI0961A
Date: November, 2013


"Scan modules HPCM2 has codes. P1FFF and P0AA6 current.

Scan check data. Isolation resistance is ok, at 325k ohms.

Perform update on BECM and HPCM2 as per bulletin PIC5920.

Also replace Coolant level sensor for high voltage battery pack with updated unit for P1FFF.

Bulletin PI0961."
Thanks, what should I expect this to cost me? I reconnected the sensor and it's ready to go into the shop.
 

·
Registered
Joined
·
4,011 Posts
Thanks, what should I expect this to cost me? I reconnected the sensor and it's ready to go into the shop.
Last time that code popped on mine (I'm still under warranty for this), it wasn't a busy day and it took about two hours to turn around, if that's any help.
 

·
Registered
Joined
·
700 Posts
Thanks, what should I expect this to cost me? I reconnected the sensor and it's ready to go into the shop.
I had exactly the same problem with my 2012 at about 85k miles. Reflashing the two modules corrected the problem and it has not returned in the last 10k miles.

It cost me about $220 to reflash these controllers. They did not replace the sensor or cable.

I asked why this was not covered under the Voltec drive train warranty and was told that Software is not a covered component. At some point GM will understand that software is a PRIMARY component in all of their control systems. $220 is very expensive to simply turn off a couple of latches in the firmware.
 

·
Registered
Joined
·
3,090 Posts
Count me in on this error too. Got the Service High Voltage Charging System message this morning and it won't charge. Unfortunately the dealer is busy, so they can't get me in until Monday.
 

·
Registered
Joined
·
3,590 Posts
I was going to take the talking point that as there was a Bulletin on a possible coolant level sensor glitch and al flashing and code reset can fix the problem only do that.

AND for a low or no charge price.

My dealer did do the adding of the original in house parts to the cooling tank in 2012 as part of the battery support upgrade.
 

·
Registered
Joined
·
294 Posts
I had exactly the same problem with my 2012 at about 85k miles. Reflashing the two modules corrected the problem and it has not returned in the last 10k miles.

It cost me about $220 to reflash these controllers. They did not replace the sensor or cable.

I asked why this was not covered under the Voltec drive train warranty and was told that Software is not a covered component. At some point GM will understand that software is a PRIMARY component in all of their control systems. $220 is very expensive to simply turn off a couple of latches in the firmware.
This is ridiculous that they said SOFTWARE is not a covered component. It is EVERYTHING and it should be covered by the warranty. com'on GM!
 
1 - 20 of 32 Posts
Top