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I have a P025a and a U0100 that went off on my 2009

I have a P025a...

I have a P025a and a U0100 that went off on my 2009 Traverse. It is now dead and won't re-start.

Mechanic's Assistant: Are you fixing your Traverse yourself? What have you tried so far?

I am, I have checked all fuses and relays, I disconnected the battery to see if it was a surge and left it off overnight. It is still not firing this morning. When I scanned the carit now says codes cleared but that is because of the disconnect of battery.

Mechanic's Assistant: Does the battery look like it's leaking? And does it have a strong smell -- like sulfur?

No, the battery was great and was replaced just last April.

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

The car was being driven and lost power. My wife pulled over and then after pulling over she shut it off and it would not restart.

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Answered in 6 minutes by:
3/16/2018
Jerry Newton
Jerry Newton, GMC Technician
Category: GM
Satisfied Customers: 5,694
Experience: ASE Master Technician, L1, Master GM Technician. Over 20 years of bumper to bumper GM experience.
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The codes point to a failure of the FPCM, or fuel pump control module. P025A says that there is mismatch between commanded and actual circuit status, and U0100 is a generic loss of communication code that doesn't point to any specific computer.

But it seems clear, at least from where I sit, that there's an issue with the FPCM. I'm attaching a schematic so you can see how the circuit works.

Please take a moment to rate my answers by clicking on the stars at the top of the page, that's how I get compensated. If you need more help, just let me know, I am happy to follow up.

Jerry Newton
Jerry Newton, GMC Technician
Category: GM
Satisfied Customers: 5,694
Experience: ASE Master Technician, L1, Master GM Technician. Over 20 years of bumper to bumper GM experience.
Verified
Jerry Newton and 87 other GM Specialists are ready to help you
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Customer reply replied 4 months ago
Jerry,
The FPCM is located on top of the fuel tank correct? Also, is this something that has to be programmed by a GM Dealership?
a replacement FPCM requires programming.
Ask Your Own GM Question

The FPCM is under the car, not on top of the tank. It's next to the fuel tank, easy to access.

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