When dealing with high-voltage control module (HPCM2) fault codes in the Opel Ampera 2012 (1.4L hybrid), many technicians or car owners often encounter codes P0AA6, P1F0E, and especially P1FFF, which is notoriously difficult to clear. This article is based on a real user experience using the VXDIAG VCX NANO GM interface and PSA Service Box to reprogram the HPCM2 module and successfully fix the issue.
Background
Vehicle: Opel Ampera 2012 1.4L
Fault Codes:
-
P0AA6 – High Voltage Isolation Fault
-
P1F0E – Battery Pack Insulation Monitoring Fault
-
P1FFF – Persistent Fault Detected by HPCM2 (non-clearable)
Among these, P1FFF is particularly stubborn and cannot be cleared using the standard GDS2 diagnostic tool. This is due to the fact that in 2012 models, this fault is “latched” unless the coolant temperature sensor has failed and been replaced.
Solution Overview
-
Reflash the HPCM2 module using VXDIAG GM J2534.
-
To reduce the chance of P1FFF returning, it is recommended to also reflash the BECM (Battery Energy Control Module).
-
Use PSA Service Box to access the SPS programming tool and carry out the procedure.
Step-by-Step Guide
1. Preparation
-
VXDIAG VCX NANO GM (J2534 compatible)
-
PC (Windows 10 preferred, admin rights required)
-
Stable and fast internet connection
-
PSA Service Box account (purchase 2-hour SPS access)
2. Purchase SPS Access
-
Log into the PSA Service Box platform.
-
Navigate to the SPS programming section and purchase a 2-hour access license.
-
After payment, you may be redirected to the login page again — this is normal. Your purchase is still active and listed under your account.
3. Launch SPS Programming
-
Click the Blue SPS button to begin your session (countdown timer starts).
-
The system will launch Tech2Win (emulated GM Tech2 tool).
-
TIS2Web will open automatically, triggering Java downloads and software installation. This process takes approximately 10 minutes on a fast internet connection.
-
You may receive errors like “no admin permission.” Continue the installation regardless.
-
Service box install and launch.
-
Once the install is complete this is the last step.
- SPS after Launch.
4. Connect the Vehicle & Start Programming
In the SPS tool, select VXDIAG as the interface.
-
Turn on the vehicle in Accessory Mode: press the Start button for 10 seconds without pressing the brake.
-
The car may trigger the anti-theft system and make shutdown noises — this is normal.
-
In the module list, locate and select K114B – HPCM2 Module.
-
Do not touch the car or the laptop while the programming process is ongoing.
-
Once complete, the system will prompt you to clear DTCs — confirm to proceed.
Important Tips
-
Do not disconnect power or the diagnostic cable during the reflash.
-
Ensure the 12V battery is fully charged; external power support is recommended.
-
If P1FFF remains after programming, inspect and possibly replace the coolant temperature sensor.
Programming Results
-
P1FFF error successfully cleared
-
High-voltage system operates normally
-
HPCM2 reflash takes approximately 20 minutes
Conclusion
Using the VXDIAG VCX NANO GM interface together with the PSA Service Box is one of the most effective ways to reprogram the HPCM2 module and eliminate the P1FFF fault in the Opel Ampera. This method not only restores system functionality but also avoids unnecessary parts replacement costs. It’s a valuable skill for professional repair technicians and EV enthusiasts alike.
If your reprogramming the BECM as well you need to follow the guide linked above and below:
