Airbag code 21

The airbag light on my 2009 Tacoma recently went on and using the flash method, I got code 21,
Which I think is the driver curtain sensor. Have others had this problem? Is it usually a connection issue or a sensor? Any advice appreciated - have never done anything with airbags before.

 

It’s for a short or open in the circuit.
See here for details.
I’ll try to help for when I get some free time later today, if you need more help.
https://www.tacomaworld.com/threads...b1635-and-strange-p1604.596877/#post-20018414

 

Thanks. This is super helpful. I’ll take a stab at it at some point over the next few days and let you know if I have any success!

 

Ok. Finally have some time to actually try to figure this out... @TnShooter, thanks for the link. Can you let me know where the sensor is? Thought they were usually in the door, but doesn't seem to be there. Also, any advice on where the short might be would be greatly appreciated!

 

There are 2 on each side on a double cab (regular & Access cabs only have 1 on each side) bolted to the floor, the code does not differentiate between them.

 

Ok, back from vacation and picking this back up again. Took off the old sensor and found some corrosion in the contact and a
little discolouration in on the clip. So picked up a used sensor and clip from a wrecker. After switching out the old sensor, ended up with a bunch of other codes now. 21, 22, 23 and 34… Any thoughts? Is there a way to clear codes? #thisisgettingfrustrating!!