2004 F150 Airbag Code 21

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2/10/2011 5:25 PM

Anyone know anything about airbag codes? The airbag warning light started coming on about 2 days ago while I was up north. It was very cold (this morning it was -20 without wind chill) and thought that might have been a factor. I got home this evening and it was +20 and the light was still on. I turned the truck off and back on and it flashes twice, then once (2-1). Any ideas of what it might be?

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2/10/2011 5:32 PM

Ferrari airbag?

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2/10/2011 5:32 PM

I wish. smile

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2/10/2011 10:28 PM

This is why these god damn POS cars and trucks cost 50 grand for a 15 K truck.

Fuck air bags. Install 5 point harnesses and a cage for a few grand.

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2/11/2011 12:35 AM

the mayor speaks!

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2/11/2011 5:21 AM

Yeah, I had found pieces of info like that but it sounds like something I might have to end up taking it in for, or ignore. I will dig around and see if I can fire the air bag off (I mean find some connections that may be suspect).

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2/11/2011 6:40 AM

Everything for the SRS Lamp Code 21 relates to the passenger airbag. Code 21 relates to five Scan Tool codes

B1925 Passenger air bag circuit short to battery
B1933 Passenger air bag circuit open
B1935 Passengerair bag inflator circuit resistance low on squib
B1938 Passenger air bag circuit short to ground
B2293 Restraint system air bag fault (Passenger front air bag circuit fault)

Not sure on Fords, but cold weather affects battery performance and on some vehicles, a weak battery can set off airbag codes.

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2/11/2011 6:59 AM

Well, I drove to work this morning and the light didn't come on so it could have been related to the extreme cold. As a matter of fact my sister said her airbag light came on as well but she has a completely different kind of vehicle (Infinity G35 or something like that). So the systems must be similar. I had just recently put a new battery in it (in the last 6 months) so wouldn't have thought that would cause it. I'll keep my eye on it though and thanks for the info newmann!

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2/11/2011 4:34 PM

Dammit, the light was when I drove home this evening and it was close to 40. Must not be temperature related.

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2/11/2011 6:43 PM

Usually a sensor. Most the times a pretty simple fix.

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2/11/2011 6:59 PM

level wrote:

Usually a sensor. Most the times a pretty simple fix.

Maybe if you know where the sensors are. smile

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