CODE P300 AND U1000

  • Tiny
  • Hummer2004
  • 2004 Hummer H2
  • 175,000 miles

Hello.

I had my Hummer H2 -04 to service and they found code P300 and U1000, it is problem with the dash panel, non of the gaugers is working. And the ABS lamp is shine when I get up in speed.
What do you think the problem is?

Sincerely Matthias

Friday, January 27th, 2012 AT 7:59 PM

4 Answers

  • Tiny
  • rasmataz
  • Member

-Possible causes here could be a wiring harness/connectors or the CAN communication is open or shorted-You probably have to see the dealership to have this fix-

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Friday, January 27th, 2012 AT 8:07 PM
  • Tiny
  • mhpautos
  • Expert
  • 29,857 posts

P300? There is a P3000 misfire code. The U1000 is a non communication code, try doing a code clear and a re scan first, the ABS should give a code as well, often a faulty wheel speed sensor.

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Friday, January 27th, 2012 AT 8:12 PM
  • Tiny
  • rasmataz
  • Member

P0300-Randon Misfires-normally caused by bad fuel and vacuum leak

Go to this link: http://www.2carpros.com/articles/engine-misfires-or-runs-rough

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Friday, January 27th, 2012 AT 8:29 PM
  • Tiny
  • Hummer2004
  • Member

Thank you for all your advice. I will test this tomorrow.
I will get back to you and tell you how it is going
Sincerely
Matthias from Sweden

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Friday, January 27th, 2012 AT 9:02 PM

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