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I have a 2014 Volt and my "service airbag" warning light (and chime) comes on a few times each drive. The warning light goes off fairly quickly and stays off until the next time it goes back on.
I recently bought a scan tool and checked the DTC codes. Apparently, one of the codes is B0081 which is for the passenger presence sensor.
Has anyone experienced this issue before? Is there a bulletin at GM to repair it? How difficult is the repair? Any other advice?
Thanks in advance!
Matt
 

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Mine started doing that periodically after my daughter got out of the car when I dropped her off for school with the car still running. Ironically, it happened 75 miles before my 36k B2B warranty was about to run out, and she had an out of town track meet after school followed by a trip to Ohare airport and back which would put us a few hundred miles over. The GM service advisor took pity on me and did the $800 fix for $100 because she also had to wait 2 weeks before she could see me (some medical emergency with their volt repair guy). I have no idea how hard it is to replace the passenger presence module, but that was the fix for my car. This issue didn't happen every time my daughter exited, but probably 20-30% of the time before I had it fixed. And yes, sometimes while driving, it would pop up that service airbag system message with nobody in the seat.
 

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I'm going to throw out a curve ball and ask if there is ANYTHING placed on the seat? The sensor is very sensitive in some cars (maybe all of them) and a little weight from a bag of donuts or a cell phone can bring on the ding dong alert.
 

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I have to agree with jbaker, my 2011 is VERY sensitive. A cell phone will trigger the seat belt alert, the first few times I had no idea what the chimes were since the indication is in the overhead near the rear view mirrior. I am not saying this is the original posters problem, just that I can verify they can be extremely sensitive.
 
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