MY ENGINE LIGHT SHOULD COME ON WITH THE GAS CAP OFF

  • Tiny
  • Ryan8624
  • 2006 Hummer H3
  • 76,000 miles

I noticed I forgot to put my gas cap back on when I got home from work about 9 miles. This truck if the gas caps off the engine lights should come on right away so why would it not come on?

Wednesday, April 11th, 2012 AT 12:24 AM

3 Answers

  • Tiny
  • ASEMaster6371
  • Expert
  • 25,549 posts

It has to fail the evap test 3 times. The test only runs after an 8 hour cold soak. It would take a day or to to be turned on.

Roy

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Wednesday, April 11th, 2012 AT 12:26 AM
  • Tiny
  • Ryan8624
  • Member

O okay thanks and I don't know if I can ask one more thing what's an air solenoid relay for and if I have a fuse that says air sol why is there no relay for it

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Wednesday, April 11th, 2012 AT 12:29 AM
  • Tiny
  • ASEMaster6371
  • Expert
  • 25,549 posts

You may not have the air pump. May be just a california option.

Roy

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Wednesday, April 11th, 2012 AT 12:31 AM

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