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My engine light should come on with the gas cap off

Tiny
RYAN8624
  • MEMBER
  • 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 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 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
  • 6 POSTS
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
  • MECHANIC
  • 52,797 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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