Having problems with your 2004 Toyota ECHO ?
Reading coder on toyota echo
\015 Can codes be read without a reader on a 2000 toyota echo\015
I am sorry but no, there are different codes some are P codes, some are B codes, and there are other ones, OBD 1 (84-96) systems could flash the check eng lite and give you codes, but they were just two numbers like 12. A typical OBD 2 code is like this P1546, this is a emission code. Kragen auto or any of the chain auto parts stores will read the codes for free.
Repair Help & Product Troubleshooting for 2004 Toyota ECHO
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