Mechanics

MY ENGINE LIGHT SHOULD COME ON WITH THE GAS CAP OFF

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?
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Ryan8624
April 11, 2012.




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

ASEMaster6371
Apr 11, 2012.
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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Tiny
Ryan8624
Apr 11, 2012.
You may not have the air pump. May be just a california option.

Roy

ASEMaster6371
Apr 11, 2012.

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