First DTC yesterday: P043E on 2015
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Thread: First DTC yesterday: P043E on 2015

  1. #1
    Join Date
    Feb 2015
    Location
    Ottawa
    Posts
    224

    Default First DTC yesterday: P043E on 2015

    CEL illuminated yesterday on our 2015 Volt. I had my scanner, but told my wife to check it with OnStar. It's the P043E code. Car was last fueled in March 9th, 26.8l of 91 no ethanol. It's never been overfilled, and there has been no smell. If it wasn't under warranty, I'd check the cap and reset the code, but I'll let the dealer take care of it. I see quite a few other members have had the same code pop up. Wonder if there was a bad batch of solenoid vents?

    I'll update this thread once it goes in...
    Caretaker of Squirrel's! 2015 Volt... and 66 cylinders of classic GMs!

  2. #2
    Join Date
    Oct 2014
    Location
    phoenix
    Posts
    168

    Default

    This is most likely due to a bad evap vacuum pump. Had one about a week ago with the same code and I found the vacuum pump is engaged but will not pull a vacuum.
    Not just a volt tech, also a volt owner.

    2015 Volt

  3. #3
    Join Date
    Feb 2015
    Location
    Ottawa
    Posts
    224

    Default

    CEL went out on Tuesday, we were scheduled for dealer yesterday. Made my wife take it in anyways. At first, they tried to tell us that "light is out, no problem". I reminded them about the historic code, and explained that they need to check the EVAP pump and likely run a smoke test. So, that's exactly what they did. Guess what? Bad pump and bad valve. Parts 22865478 and 25949410.
    Caretaker of Squirrel's! 2015 Volt... and 66 cylinders of classic GMs!

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