Question

What does code B1800 51 mean in my 2008 Toyota Tacoma? srs light won't go out this is a Toyota OEM code number

Answer 1

The B1800 code indicates an issue with the driver-side airbag. If the airbag was deployed, you must replace the airbag, otherwise check the airbag for damage or loose connection.

Here is the link to the code page for more information about the code:

B1800 Toyota Code - Short In Driver Side Squib Circuit
Read more: https://www.autocodes.com/b1800_toyota.html