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Discussion Starter #1
Hello from sunny Portugal.

I bought a used Ampera here 3 weeks ago. A couple of days ago after driving over some very rough road in the middle of roadworks I returned home to find the car wouldn't charge and the message 'Service high voltage charging system' was displayed. My old Autel scanner read some codes but the message returns after clearing. Volt forums indicate that DTC P1FFF is 'locked' and can only be cleared by reflashing the HPCM2 module - assuming it's a false fault which seems to be fairly common.

There is little consumer protection here and caveat emptor definitely applies!

I took the car to the main Opel dealer in the state where I live and after 6 hours of dossing in the nearby shopping mall was told they 'didn't have the equipment to do it' and hadn't looked at the car. I was told to take it to the main dealer in Lisbon - more than 3 hours away.

I know I can register for tis2web and get an hourly/daily subscription, and hardware is pretty cheap (e.g. VCX nano) and reflash it myself with SPS.

Question: Can the basic tis2web/SPS subscription re-flash the HPCM2 module or does it require 'Enhanced Access' and therefore a DUNS number for a real company only?

Thanks in advance for any clues!

deGuv
 

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Do you have the link to the volt forums thread
 

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Discussion Starter #4
I guess nobody knew the answer.

So, answering myself in case it helps anyone else: Yes, with a standard (non-enhanced) tis2web account you can use SPS to reprogram the HPCM2 module and clear the locked fault code. My Ampera is charging once more.

I used a VCX Nano dongle, so with the cost of that, joining fee for the GM portal, plus 2x 1-hour subscriptions (I didn't realise the first hour I bought would start immediately - I didn't have the dongle at that point) cost me 170€ and saved me a 6-hour round trip plus probably a hotel for the night plus whatever the main dealer charged for the reprogram.

Win!

'guv
 
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