You need to connect it to a code reader. That gives you the code, the code tells you the problem and the fix. A local garage will usually read the codes for no charge in the hope of getting the work. It takes less that 2 minutes to do. Or you can get a code reader and do it yourself.
Foxwell NT510 for TOYOTA Gaia OBD2
Diagnostic Reader Erase Error Code
Scanner Tester SRS ABS DPF EPB Airbag Oil Service in Code
Readers & Scan Tools.
More than just a list of Toyota
Check Engine Light Codes
! ... Below you will find the most complete list of Toyota
available. ... If there is no procedure for your manufacturer specific code
, then I suggest referring to a similar generic OBD
(these are listed numerically by system type) to get a good idea of ...
FOXWELL NT510 for TOYOTA GAIA OBD2
DIAGNOSTIC SCANNER ERROR CODE
READ ERASE ABS ' eBay Motors, Automotive Tools & Supplies, Diagnostic Service Tools ' eBay!
I have one of these which links to my iPhone
FIXD Automotive Understand Your Car