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Discussion Starter #1
Problems with VOLT/AMPERA

Hi there,

I have a big issue with my car :(. I'm owner of OPEL/Vauxhall Ampera, basically same car as Chevy VOLT.

It started with Service High Voltage Charging system but then dealer upload new programs in the system and then they found the following errors in pictures (ignore text because is Slovenian language, see DTC column IMG_3720.JPG IMG_3719.JPG IMG_3718.JPG ).

Opel factory in Germany claims that we need to fix error P0AC4/P2534 (some magnetic valves in gearbox).

Can anybody help, please?

Best Regards, Bojan
 

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Discussion Starter #2
Hi there, anybody please help.

I'm the owner of Opel AMPERA this is the same car as Chevy VOLT.
Problems started with Service High Voltage Charging system but dealer update modules with a new program and they found more errors. I will add also pictures.

Opel factory claims that they need to fix errors P0AC4/P2534. They told me that this are some magnetic valves in gearbox.

THX

Best Regards, Bojan
 

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DTC P2534 - Fuel Pump Control Module The FPCM detects that the IGN voltage is less than 6.0 V.

jou have a bad 12V battery or a bad fuel pomp.(y'm not a gm tech)
 

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The P2534 is set due to a low voltage issue. If they just programmed some modules, they may have let the 12 volt battery go flat. I would start by testing the 12 volt battery and replace it if its weak. If the battery test good or was replaced, cleared the codes and drive the car, recheck for codes.
Dtc P0AC4 is set by the Hybrid Powertrain Control Module (HPCM) because there is another code set in the system by another module most likely due to the P2534 being set. This codes only function is to turn on the check engine light.

Check the 12 volt battery and repair as needed, clear all codes and test drive.
 
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