Cadillac Escalade air bag light Code B0040

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jc

Cadillac Escalade air bag light Code B0040

Unread post by jc » Mon May 10, 2010 9:18 pm

My air bag light is on in my escalade, I had the truck checked with the scan tool and it said my 3rd rail bag is deployed (it is not) and it has a code of B0040 (which I am told is a bad clock spring or a loose connector in the stearing wheel . The tech said he could not turn the light off with the scan tool . That is strange two different ends of the truck and the truck has not been hit in the front,or the side or the back.. I do have a junk battery
in the truck and I plan to have it replaced it has a warranty, I read that this can give a light if the back up battery for the air bags gets low. Help.

TechIII

Re: air bag light

Unread post by TechIII » Tue May 11, 2010 8:20 pm

There is no back-up battery for the airbag system. There is a backup for the onstar.
not sure why someone told you that.
There are many different components to this system. Having 1 or fail is not that uncommon.

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